# Frontiers in Gamma Ray Spectroscopy FIG18

12-14 March 2018
TIFR, Mumbai
Asia/Kolkata timezone
FIG 2018
Home > Contribution List
Displaying 95 contributions out of 95
Type: Poster
The nature of γ-bands is discussed through the variation of the energy of the lowest 2+ excitation and the energies of excited level sequence of γ-bands with respect to various parameters. The shape phase transition observed at N = 88-90 is reviewed through the γ-band. We attempted to find a correlation between the properties of ground band and the γ-band. The band head energy of γ-band is fo ... More
Presented by Ms. Monica KARDAY
Type: Oral
Modern ab initio approaches, like the IM-SRG, the coupled cluster theory and the self-consistent Green’s function method, have been established and provide accurate description of nuclear properties. The ab initio approaches are more fundamental, although in many cases empirical interactions still are used as benchmarks. The ab initio calculations can be used not only for spherical nuclei, but a ... More
Presented by Dr. Praveen Chandra SRIVASTAVA on 14 Mar 2018 at 12:15 PM
Type: Oral
Nuclei in the region between the doubly magic 208Pb and reflection asymmetric nuclei around A ~ 220 provide an ideal platform to understand evolution of octupole collectivity. It has been established that octupole correlation suddenly emerge at N = 129, while nuclei with N < 129 show characteristic of near spherical nucleus. The octupole correlations are reflected in sequences of alternating-parit ... More
Presented by Dr. AJAY DEO on 13 Mar 2018 at 2:00 PM
Type: Invited Talk
Recently a number of experiments were performed at VECC-INGA array with low energy (28-40 MeV) alpha beam. The array consists of six to seven Compton suppressed Clovers and one LEPS along with digital data acquisition system. The primary physics issues addressed in the present campaign is the study of non-yrast excitation modes in nuclei across A 190, 160, 130, 110, 70, 40 mass regions. Di erent ... More
Presented by Prof. A. GOSWAMI on 14 Mar 2018 at 2:30 PM
Type: Poster
The high spin states of neutron deficient and stable isotopes remain a topic of significant interest in nuclear structure research. Heavy-ion fusion evaporation reactions are used to populate the high-spin states of these nuclei. Different exotic nuclei with quite low cross-sections can be populated in the charged particle emission channel. Large array of Compton suppressed High-Purity Germanium ( ... More
Presented by Mr. Md. S. R. LASKAR, Prof. Rudrajyoti PALIT
Akhil Jhingan1*, R. Palit2, R. P. Singh1 1Inter University Accelerator Centre, P. O. Box 10502, New Delhi – 110067 2Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai 400005 * akhil@iuac.res.in, jhinganakhil@gmail.com The development of high resolution large gamma arrays such as INGA [1,2] have provided opportunities to nuclear structure studies wi ... More
Presented by Dr. Akhil JHINGAN on 13 Mar 2018 at 2:15 PM
Type: Poster
The determination of the mass of two millisecond pulsars, PSR J0348+0432 with a mass of 2.01 ± 0.04M⊙ [1] and PSR J1614-2230 with a mass of 1.928 ± 0.017M⊙ [2] with high precision has provided a challenge to develop an equation of state (EOS) stiff enough to give such high mass. It is natural to believe that such high mass neutron stars should have high density neutron matter in its core. At ... More
Presented by Prof. Rabindranath MISHRA
Type: Invited Talk
The talk will focus on (a) high-resolution gamma-ray spectroscopic studies of beta-delayed neutron-emitters far from stability at the the Californium Rare Isotope Breeder Upgrade (CARIBU) facility at Argonne National Lab; and (b) advances in fast neutron spectroscopic techniques with CLYC scintillators at Los Alamos National Lab and at the Radiation Laboratory at UMass Lowell.
Presented by Prof. P. CHOWDHURY on 13 Mar 2018 at 12:15 PM
Type: Invited Talk
We have started a CAGRA (Clover Array Gamma-ray spectrometer at RCNP/RIBF for Advanced research) project at RCNP, Osaka Univeristy. This project constructs a Compton-suppressed Germanium clover array (CAGRA) by an international collaboration (U.S.-Japan-China-Italy, …). It consists of 16 Ge Clover detectors with BGO Compton shields. and a digital data acquisition system employing GRETINA digitiz ... More
Presented by Dr. Eiji IDEGUCHI on 13 Mar 2018 at 11:15 AM
Type: Poster
Study of the structure of nuclei having very small binding energy emerged has been emerging as one of the most interesting branches of physics. The exotic halo nuclei are very weakly bound, having extended low density tail and significantly large rms matter radii, are being studied extensively with the advent of RIB facilities. We apply a novel technique to study resonances in nuclei having at l ... More
*A. Jhingan1, B. R. Behera2, S. Mandal3, P. Sugathan1, N. Madhavan1, J. Vesic4, S. Pietri4, P. Boutachkov4, M. Gorska4, H. Schaffner4, I. Kojouharov4, J. Gerl4, H. J. Wollersheim4. 1Inter University Accelerator Centre, P. O Box 10502, New Delhi – 110067 2Department of Physics, Panjab University, Chandigarh- 160014, India 3Deptartment of Physics and Astrophysics, Delhi University, Delhi - 11 ... More
Presented by Dr. Akhil JHINGAN
Type: Invited Talk
From the early days of nuclear-structure physics, the nature of the second 0+ state in $^{16}$O has been an attracting issue. This nucleus is a typical doubly magic nucleus, and its second 0+ state is interpreted as a four-particle four-hole state. The excitation energy of this state, however, looks too low, considering the large shell shell gap that is naively estimated to be about 11 MeV. In fac ... More
Presented by Dr. Yutaka UTSUNO on 14 Mar 2018 at 10:45 AM
Type: Poster
Spectroscopic investigation of weakly deformed nuclei in mass A ∼ 140 region has generated considerable interest as they exhibit varieties of excitation mechanisms at higher excitation energy. The multi-particle configuration along with its small deformation plays an important role at higher excitation energy resulting in several novel phenomena, like shears mechanism, octupole correlation, chir ... More
Type: Poster
Theoretical understanding of the band structure of nuclei crucially depends on the correct spin-parity assignment to bandheads. The standard techniques of directional correlation ratio and polarization are sufficient to find spin-parity of a state. However, sometimes ambiguity remains; in particular, for the mixed or non-stretched transitions. The data analysis based on the polarization directi ... More
Presented by Mr. Virendra Kumar PASI
Type: Poster
A total of six pairs i.e. (130Ce and 134Nd, 131Ce and 133Pr, 144Gd and 148Gd, 194Hg and 198Po, 194Tl and 195Bi, 195Tl and 197Bi) of superdeformed rotational bands possessing same F0 symmetry has been investigated. The band head spin (I0) of the six pairs possessing same F0 symmetry are assigned by using the nuclear softness formula [1]. The root mean square deviation is calculated by computing the ... More
Presented by Ms. Honey SHARMA
Type: Invited Talk
The HISPEC/DESPEC experiments will explore the problems related to nuclear structure, reaction and astrophysics far from the valley of stability using γ-ray spectroscopy techniques. The experiments will be carried out after successful production, separation, and selection of these exotic nuclei at Super-FRS of FAIR. Based on the physics requirement various tracking and identification detectors wi ... More
Presented by Dr. Sudipta SAHA on 14 Mar 2018 at 9:30 AM
Type: Poster
The nuclei in the mass region A ≃125 lie between the spherical Tin nuclei and strongly deformed Cerium nuclei; so are transitional with respect to their shapes at low and high angular momenta. The presence of an h11/2 intruder orbital, accessible to both protons and neutrons, govern the shape of the nucleus as these h11/2 nucleons have opposite deformation driving effects. Therefore, the afterma ... More
Presented by Ms. Anwesha BASU
Type: Poster
In mass 200 region, nuclei close to 208Pb show variety of band structures representing different ways of coupling of the odd valance particles with the core. The ground and first few excited states are dominated by the pure single particle orbitals near Fermi level, while the excitation of valance particles or holes to the high-j intruder orbitals play an important role in bringing high angular m ... More
Presented by Mr. Soumik BHATTACHARYA, Mr. RANABIR BANIK
Type: Oral
Recent experiments have indicated that the significant fusion incompleteness plays an important role in heavy ion induced reactions even at energies as low as ≈ 4-7 MeV/nucleon. The enhancement in the measured cross-sections of α-emitting channels as compared to that predicted by statistical models, has been attributed to the incomplete fusion (ICF) processes. Here, information about the angula ... More
Presented by Prof. B P SINGH on 13 Mar 2018 at 2:45 PM
Type: Invited Talk
Investigation of Te-nuclei has been subject of considerable interest because of their transitional character. Particularly, the h11/2 orbital play important role in Te nuclei, because the alignments of low-Ω h11/2 valance protons outside the core drive the nucleus towards prolate shape and the aligned high-Ω neutrons drive the nucleus towards oblate shape and induces tri-axiality. As of this, ba ... More
Presented by Prof. Hariprakash SHARMA on 14 Mar 2018 at 2:00 PM
Type: Invited Talk
Evolution of collectivity and symmetry in nuclei S. Muralithar (on behalf of INGA group at IUAC) Inter University Accelerator Centre, New Delhi, 110067, India Studies of extreme nuclear shapes fascinated scientists and are pursued over decades. Nuclei present themselves with interesting shapes and structures at different spin, excitation energy and also with number of neutrons and protons pr ... More
Presented by Dr. Muralithar S on 12 Mar 2018 at 12:30 PM
Type: Poster
Nuclei with Z and N between 20 and 28 are unique as the A‒40 nucleons occupying f7/2 shell outside 40Ca core are low enough to allow a full shell model description, but at the same time the numbers are large enough to develop collective behavior. The level scheme of 51Cr nucleus with four proton particles and one neutron hole is indicative of single particle nature. But a strongly deformed band ... More
Presented by Dr. Ritwika CHAKRABARTI
The Lu nuclei (A = 161 -167) present normal deformed prolate shape near ground state but assume strongly deformed triaxial shapes (TSD) [1] at I >= 25 h. The origin of large triaxiality ($\gamma$ ~ 150) giving TSD bands at high spins in Lu nuclei, though difficult to describe, is rather important in order to understand. Interestingly, beyond 167Lu [2], no other higher mass Lu nuclei has shown any ... More
Presented by Prof. S.K CHAMOLI on 13 Mar 2018 at 3:00 PM
Type: Invited Talk
The international FAIR project at GSI aims for an unprecedented facility for research with stable and radioactive ion and anti-proton beams. It will comprise of ion beam accelerators, storage rings, an anti-proton source, a fragment separator and experimental set-ups for four research pillars. These pillars are organized in large collaborations involving almost 3000 scientists: APPA for atomic and ... More
Presented by Dr. J. GERL on 13 Mar 2018 at 10:15 AM
Type: Invited Talk
The study of nuclei far from stability is one of the most active and challenging areas of nuclear structure physics. One of the most exotic neutron-rich nuclei currently accessible to experiment is 40Mg, which lies at the intersection of the nucleon magic number N=28 and the dripline, and is expected to have a large prolate deformation similar to that observed in neighboring isotopes 32-38Mg. In a ... More
Presented by Prof. P. FALLON on 12 Mar 2018 at 9:50 AM
Type: Invited Talk
Nuclear fission process offers an opportunity to study the interplay of the nuclear structure and dynamics in the fission process. In nuclear fission, a large number of neutron-rich nuclei are produced and the shape of the fissioning nucleus evolves in the multidimensional space of relative separation, neck opening, mass asymmetry and deformation of the fragments. In this talk the role of nuclear ... More
Presented by Dr. D.C. BISWAS on 12 Mar 2018 at 2:00 PM
We emphasise the role of interacting Neutrons and Protons in large Shell Model Spaces, interacing by effective two-body interactions , in determining nuclear properties, deformations and spectra. Theoretical formalism to study the many-body interacing system will be discussed. Deformed Hartree-Fock theory and Angular Momentum Projection (along with diagonalisation for band mixing will be disc ... More
Presented by Prof. C.R. PRAHARAJ on 12 Mar 2018 at 4:00 PM
Type: Poster
Studies of shell structures of neutron rich A~50 are gaining much attention from both the theoretical experimental point of view. One example of N=32 and/or 34 sub shell closer by changing the single particles orbit in this mass region [1]. A spectroscopic study of the yrast high spin state provides important information on the presence of shell gap, since large jumps in transition energies at hig ... More
Presented by Mr. M.Kushal KUSHAL
Type: Poster
Mercury isotopes in the A~190-200 region are host to a variety of particle-rotor coupling mechanisms leading to the generation of high spin states. In the present work, we report on the spectroscopic study of decoupled and semi-decoupled bands in 197Hg and 199Hg isotopes. High spin states in these nuclei were populated using multi-nucleon transfer reactions between a 1450-MeV 209Bi beam and a 197A ... More
Presented by Dr. Dinesh NEGI
Type: Poster
Incomplete fusion (ICF) dynamics of heavy ion (HI) interaction with different targets has been a topic of resurgent interest at energies above the Coulomb barrier [1-2]. At these energies, the most dominant reaction modes are complete fusion (CF) and incomplete fusion (ICF) process. In complete fusion (CF) process, the projectile is completely fused with the target nucleus, forming a highly excite ... More
Presented by Dr. D. SINGH
Type: Oral
The dynamics of the reactions involving weakly bound nuclei is a topic of current interest [1-3]. The low breakup threshold of such nuclei leads to the breakup as well as fragment-capture reaction processes and consequently affect the reaction dynamics. Here, the fragment capture reaction mechanisms have been studied for 7Li + 93Nb system. Exclusive particle-γ coincidence measurements were perfor ... More
Presented by Mr. Sanat PANDIT on 13 Mar 2018 at 2:30 PM
Type: Poster
The level structure of the odd-mass 29Al nucleus has been investigated following heavy-ion induced fusion evaporation reaction, 18O(13C, 1p1n)29Al. The accelerated beam at 30-MeV was provided by the BARC-TIFR Pelletron Linac facility at Mumbai, India. The de-exciting gamma rays were detected using INGA (Indian National Gamma Array). During the time of the experiment, the array was comprised of fif ... More
Presented by Mrs. Hajera SULTANA, Ms. Rajashri BHATTACHARJEE, Dr. Anagha CHAKRABORTY on 13 Mar 2018 at 2:30 PM
Type: Poster
The level structure of 78Se nucleus has been investigated using alpha beam from the K-130 Cyclotron at VECC, Kolkata. The excited states of the aforesaid 2n-channel residual nucleus were populated employing the 76Ge(alpha,2n) fusion evaporation reaction. The enriched 76Ge target for this measurement was prepared on mylar backing through centrifuge process. Two such targets were stacked together to ... More
Presented by Mr. Kironmoy MANDAL, Dr. Anagha CHAKRABORTY, Mr. Amit Kumar MONDAL
Type: Poster
Nuclear meta-stable states with long half-lives are known as isomers. Systematically, rotational bands above one-quasineutron isomeric states were reported in odd-A Te-Xe-Ba isotopes around A = 130. Isomeric states with three-quasiparticle configurations are also expected in these nuclei, but reported only in 129Ba, 131,133Xe. Also, an isomeric state at 2730 keV, with T1/2 = 25 ns, was reported in ... More
Presented by Mr. Saikat CHAKRABORTY
Type: Poster
Isotopes of Tl (Z=81) near the line of stability have weakly-deformed oblate to near-spherical shapes. With increase in neutron number approaching N=126, intrinsic excitations dominate the yrast line. The nucleus 201Tl lies in this transitional region. Excited states at high spin with predominantly intrinsic configurations were studied, with a focus on isomeric levels. The data were obtained from ... More
Presented by Ms. Poulomi ROY
Type: Invited Talk
Nuclei with Z < 82 and multiple nucleons in hole states with respect to the heaviest doubly-magic nucleus 208Pb are near-spherical, and have high-j valence orbitals: neutron i13/2 and proton h11/2, present near the respective Fermi surfaces. These are suitable conditions for the realization of high-spin isomers with configurations having dominant contributions from high-j orbitals. Several isomers ... More
Presented by Prof. S.K. TANDEL on 13 Mar 2018 at 9:00 AM
Type: Poster
Doppler shift attenuation method is a modern technique to measure the nuclear lifetimes in picosecond range. However, the data analysis and results depend very sensitively on the various input parameters. The statistical quality of the data also plays an important role. Therefore, it is a challenge to obtain the accurate results. We populated the high spin states of 129Cs using heavy ion fusion ... More
Presented by Mr. Umakant LAMANI
Type: Invited Talk
Recent advancements in experimental techniques now enable us to study not only excited-state energies but also electromagnetic transition strengths across long isotopic chains. In particular, the reduced electric quadrupole transition probability, B(E2), connecting the lowest-lying states directly probes the corresponding wave functions and hence provides stringent tests of theory. The results ob ... More
Presented by Prof. B. CEDERWALL
Type: Poster
Nuclei in the vicinity of highly deformed as well as near-spherical region are expected to exhibit multi-faceted excitation modes in their level structures. 96Sr and its N=58 isotone, 98Zr, are positioned at one such interesting point in the nuclide chart. It was also predicted earlier that the 0+ states in these nuclei are associated with different types of deformations. As these neutron-rich nu ... More
Presented by Mr. A.K. MONDAL, Dr. S. MUKHOPADHYAY, Dr. A. CHAKRABORTY
Type: Poster
Quadrupole moment of the n-rich I nuclei are of extreme importance to understand the single particle energy (spe) and n-n interaction around double shell closure of 132Sn. The energy of the first 5/2+ level in N = 84 Sb come down in energy compared to the neighboring Sb isotopes with N ≤ 82. This observation is explained with lowering of spe [1] as well as the n-n interaction [2]. Similar anomal ... More
Presented by Mr. Shaikh SAFIKUL ALAM
Type: Poster
We carried out an experiment(E398) to measure the energy and emission probabilities of gamma-rays from the giant resonances16O and 12C at Research Center for Nuclear Physics in Osaka University, using 392-MeV proton beam, high-resolution magnetic spectrometer "Grand Raiden" and an array of NaI(Tl) scintillators. The nucleus excited to the giant resonances(GR) may decay via hadronic mode by em ... More
Presented by Mr. Mandeep Singh REEN
Type: Invited Talk
We have carried out an experiment E398 at RCNP (Osaka) to measure gamma rays from both hadronic decay and direct electromagnetic decay of giant resonance of 12C and 16O using 392-MeV proton beam, high-resolution magnetic spectrometer Grand-Raiden and an array of NaI(Tl) counters. We first confirmed the consistency of our cross section of the known levels (12.71MeV, 15.11MeV) with the previous ... More
Presented by Dr. Makoto SAKUDA on 13 Mar 2018 at 4:00 PM
Type: Poster
Experiment(E398) was carried out at RCNP(Osaka) to measure the energy spectrum and emission probabilities of gamma-rays from giant resonances of 12C and 16O using 392-MeV proton beam, high-resolution magnetic spectrometer "Grand Raiden" and array of NaI(Tl) scintillators. Gamma-ray emission probability from the giant resonances of 12C and 16O has been measured as a function of excitation energ ... More
Presented by Mr. Takashi SUDO
A shape-transitional nucleus that sits at the limit of nuclear axiality and the onset of nuclear triaxiality has rarely revealed such a wide range of features in its excited level structure as in the case of 188Pt. The medium- and high-spin level structures in this nucleus have been thoroughly investigated using Indian National Gamma Array (INGA) at TIFR, Mumbai. One exotic sequence of energy leve ... More
Presented by Dr. Somsundar MUKHOPADHYAY on 13 Mar 2018 at 2:15 PM
We have studied theoretically, using deformed Hartree-Fock and angular momentum projection, the structures and spectra of excited large K configurations of multi-quasi-particle nature (upto 8 quasi-particle) for heavy Hafnium nuclei. Not much is known experimentally about such multiquasi-particle configurations and their band structures. We have theoretical results for the spectra and E2 and M1 ma ... More
Presented by Prof. C.R. PRAHARAJ
Type: Poster
Investigation of Te-nuclei could provide a base to study shape and phase evolution in nuclei, as it lies between spherical vibrator (Sn) and γ-soft triaxial rotor (Xe, Ba). Systematically, coexistence of collective and non-collective states has been observed in 118-122Te [1-3]. In order to extend systematic on Te-nuclei, high spin states of 124Te has been populated via 124Sn(9Be,α3n)124Te react ... More
Presented by Mr. SHASHI SHEKHER TIWARY
Type: Poster
Study of proton emitters is important in nuclear physics and astrophysics both [1, 2]. The astrophysical rapid-proton capture process is inverse of the proton emission from the ground or low isomeric states. We study the structural and decay properties of triaxial proton emitting nuclei with the microscopic nonadiabatic quasiparticle approach [3]. In this approach, the rotor energies and wave func ... More
Presented by Dr. Swati MODI
Type: Invited Talk
Observation of neutrinoless double-beta decay $(0\nu\beta\beta)$ would both demonstrate the Majorana nature of the neutrino and provide experimental access to its absolute mass scale. A great deal of experimental effort is, therefore, being dedicated to the detection of this rare process. However, results of nuclear structure calculations of nuclear matrix elements which mediate the decay diff ... More
Presented by Dr. D. AYANGEAKAA on 13 Mar 2018 at 5:00 PM
Type: Poster
This paper presents behavior of nuclear radius parameter (r0) of alpha-daughter nuclei with parent neutron and proton numbers. Preston’s spin–independent equations [1] of alpha-decay radioactivity were used to calculate the nuclear radius parameter (r0) of 184 even–even nuclides from up-to-date experimental alpha-decay data. Variation of r0 parameters with parent neutron number for differe ... More
Presented by Dr. Sukhjeet SINGH
Type: Invited Talk
The SPES Radioactive Ion Beam facility at INFN-LNL is presently in the construction phase. The facility is based on the Isol (Isotope separation on-line) method with an UCx Direct Target able to sustain a power of 10 kW. The primary proton beam is provided by a high current Cyclotron accelerator with energy of 35-70 MeV and a beam current of 0.2-0.5 mA. Neutron-rich radioactive ions are produced b ... More
Presented by Dr. Francesco RECCHIA on 13 Mar 2018 at 11:45 AM
Type: Invited Talk
The nuclei approaching the neutron and proton major shell closure at N=Z=50 provide a unique opportunity to study interplay between the single particle and collective degree of freedom and the influence of the valence orbitals on deformation. Theoretical interpretation of band structures observed in the nuclei approaching major shell closures at N=Z=50 have revealed diversity in the deformation-ge ... More
Presented by Dr. S. SIHOTRA on 13 Mar 2018 at 9:30 AM
Type: Invited Talk
he emerging experimental program with brilliant gamma beams at the Extreme Light Infrastructure – Nuclear Physics facility (ELI-NP), which is under construction in Magurele, Romania will be presented with emphasis on the prepared day-one experiments. Experiments at ELI-NP will cover nuclear resonance fluorescence (NRF) measurements, studies of large-amplitude motions in nuclei, photofission and ... More
Presented by Prof. D.L. BALABANSKI on 13 Mar 2018 at 10:45 AM
Type: Invited Talk
Nuclei at high angular momentum states exhibit various symmetries. The underlying physics which describe these symmetries are often model dependent. Therefore, it is difficult to find a unique set of experimental observables. Originally, Chiral symmetry was recognized by two nearly degenerate bands. A stringent test of Chirality now is the observation of a regular pattern of reduced transition ... More
Presented by Prof. Pragya DAS on 12 Mar 2018 at 3:00 PM
Type: Poster
The K = 0 bands in doubly odd nuclei [1, 2] are known to display an additional energy shift due to residual n- p interaction [3], which is known as the Newby shift [4,5]. This shift is not fully understood even now, particularly the sign of the shift. We have analyzed the updated and new experimental data of all the K= 0 bands in odd – odd nuclei [6, 7] available in the rare earth region. The ca ... More
Presented by Kawalpreet KALRA
Type: Invited Talk
The Kolkata Centre of the UGC-DAE Consortium for Scientific Research has been contributing to the nuclear structure research in the ountry for around two decades starting with setting up a modest clover array at TIFR in 1999 and later working towards conception and installation of the Indian National Gamma Array (INGA). The Consortium has been one of the key partners in the use, operation, mainte ... More
Presented by Prof. S. S. GHUGRE on 14 Mar 2018 at 9:00 AM
Type: Poster
Atomic nuclei possess a wide variety of shapes in both their ground and excited states. The shapes may range from spherical to deformed, from quadrupole to octupole, and even more exotic shapes, such as super-deformed and tetrahedral. For deformed nuclei, they in general possess an axially symmetric shape. The loss of axial symmetry would lead to a triaxial shape. The wobbling motion and chiralit ... More
Presented by Dr. Subhendu RAJBANSHI
Type: Poster
The experimental data for the heavy mass fission fragments in thermal neutron induced fission is very scarce because of experimental limitations. Invoking the idea of isospin conservation in heavy mass neutron-rich systems [1, 2], we predict the fission fragment mass distribution for thermal neutron induced reaction 245Cm(nth, f). We have already reported similar kind of calculations for heavy ion ... More
Presented by Ms. Swati GARG
Type: Invited Talk
Nuclei near shell closures provide the opportunity to probe the various aspects of excitations of single particle orbitals and their shape driving effects. Collectivity can be induced in near spherical nuclei close to shell closure due to the high-j intruder single particle orbitals. The nuclei near Z=50, N=82 and Z=82, N=126 shell closure is difficult to access by heavy ion reactions and light io ... More
Presented by Dr. S. BHATTACHARYA on 12 Mar 2018 at 2:30 PM
Type: Invited Talk
The characteristic -decay of the excited states of the long chains of isotopes of fission fragments provides fingerprints of the evolution of the underlying nuclear configurations of individual and collective motion of the nucleons as a function neutron-proton asymmetry and angular momentum. The characterization of the -decay of the excited states of these nuclei, especially those far from ... More
Presented by Dr. A. NAVIN on 12 Mar 2018 at 11:30 AM
The energy on which our life depends originates in nuclear reactions at the center of the nearest star, our sun. The understanding of these processes has developed greatly by the major efforts in observations, however there are still challenging questions remain to answer. The understanding of these phenomena requires precise cross section information’s. The 3 MV particle accelerator facility at ... More
Presented by Dr. Tarkeshwar TRIVEDI on 13 Mar 2018 at 2:45 PM
Type: Invited Talk
In A ~ 130 mass region, the nuclei show many interesting phenomena like shape coexistence, MR bands, chiral bands and spin isomers. They are γ-soft in the ground state with triaxial deformation. The 134Ba nucleus has already studied for low-spin states and seen to be one of the best candidate for E(5) critical point symmetry . In the previous experimental study, the 10+, 5- and 7– isomeric sta ... More
Presented by Dr. Kumar SURESH on 14 Mar 2018 at 11:45 AM
Type: Poster
The level structure of A~100 nuclei reveals intriguing phenomena even at low and moderate spin regimes such as vibrations and rotations built upon prolate deformed states [1,2,3]. The underlying configurations present a favourable condition for the possible observation of wobbling, even at low spins [4]. The aforementioned features provided the necessary impetus for us to revisit the level structu ... More
Presented by Mrs. A SHARMA
The most important tool in understanding the structure of nuclei is the building of their level schemes. Identification of $\gamma$ transitions and building level scheme is the first and most important step in spectroscopic studies. However, when the results are reported by researchers, due to several reasons, the energy levels, which depopulate via newly identified transitions, often get reported ... More
Presented by Prof. P.K. JOSHI
Double beta decay (DBD) is a rare second-order weak nuclear transition, first suggested by Maria Goeppert-Mayer in 1935 [1]. Generally, in the case of a beta unstable parent nucleus it is extremely difficult to distinguish the rare DBD from an intensive single beta decay background. There are 35 even-even nuclides with single beta decay either energy forbidden or spin suppressed, which makes it po ... More
Presented by Prof. V. NANAL on 13 Mar 2018 at 4:30 PM
Type: Invited Talk
We present an overview of the seniority and generalized seniority approaches and the various experimental signatures of their validity. We also discuss how the seniority isomers arise and under what conditions. We test the validity of the seniority quantum number with increasing j and in the presence of many j-orbitals. We find that the generalized seniority quantum number retains its applicabilit ... More
Presented by Prof. A.K. JAIN on 12 Mar 2018 at 12:00 PM
Type: Invited Talk
The study of various modes of excitations and the associated evolution of nuclear shapes along spin and isospin axes in atomic nuclei is one of the fundamental quest in nuclear physics. In this regard, the neutron rich nuclei with Z~40 and N~60 have attracted considerable attention recently. While the ground states of Sr, Zr, and Mo isotopes with N ranging from the magic number N = 50 up to N<6 ... More
Presented by Dr. Purnima SINGH on 12 Mar 2018 at 3:30 PM
Type: Poster
Numerous experimental and theoretical studies are currently focused on studying the nuclear shell structure of nuclei far from the line of stability. In particular, the evolution of nuclear properties, for example, the reduced transition probabilities across the Z = 50 isotopic chain, has been examined in detail. Radioactive ion beams yield new experimental results close to the doubly magic 100Sn ... More
Presented by Dr. Mansi SAXENA
on 13 Mar 2018 at 3:00 PM
on 14 Mar 2018 at 12:45 PM
on 13 Mar 2018 at 12:45 PM
Type: Poster
Many doubly odd nuclei in the mass region ~130 have been studied earlier for the phenomena of signature splitting, signature inversion and Chirality e. g. 126I [1], and 128I was also a good candidate. However, being close to β-stability line, it was difficult to populate 128I via compound nuclear reaction. In our preliminary investigations, we observed a good cross section ~ 80 mb [2] of inco ... More
Presented by Mr. Bhushan BHUJANG, Mr. Virendra Kumar PASI
Type: Poster
The spectroscopic study of high spin states in A =70 region have been attracted considerable interest due to occurrence of various exotic phenomena like shape co-existence, shape evolution, bandcrossing, back-bending, band termination, chirality, magnetic rotation etc.[1,2]. In even-even 70Ge nucleus, the protons and neutrons occupy the same orbitals, π(g9/2) and ν(g9/2) and hence easily aligned ... More
Presented by Mr. Sutanu BHATTACHARYA, Dr. Tarkeshwar TRIVEDI
Type: Poster
Nuclei around Z > 50 and N < 82 are interesting testing ground to explore the suitability and predictive powers of nuclear models at both low and high spins. Particular interest in the A ~ 130 transitional mass region is that, at low spins, the nuclei show small axial deformation whereas at higher spins, shape coexistence may occur due to the competition between the proton alignment to the prolate ... More
Presented by Mr. RANABIR BANIK, Dr. S. BHATTACHARYYA
Type: Poster
Low lying states of $^{150}$Sm have been studied through decay spectroscopy of odd-odd $^{150}$Pm, populated with $^{150}$Nd(p,n)$^{150}$Pm reaction at E$_beam$=8.0 MeV using 97% enriched $^{150}$Nd target and VENUS array of six Compton suppressed Clover HPGe detectors. Twenty new transitions are placed, five tentative $\gamma$-rays are confirmed and ten transitions are found to have altered place ... More
Presented by Mr. Arunabha SAHA, Mr. S.S ALAM
Type: Poster
In the mass region A ~ 60-80, nuclei excited by heavy-ion induced nuclear reactions have revealed a variety of excitation modes, which so far cannot be explained completely in a single theoretical nuclear model. Describing the collective phenomena for the less deformed Zn isotopes with vibrational modes which for the heavier, more deformed nuclei Se and Kr converts into a rotational description. S ... More
Presented by Mrs. Indu BALA
Type: Invited Talk
The medium light nuclei situated in the nuclear chart between the double magic nuclei 40Ca and 58Ni exhibit many features characteristic for well deformed heavier nuclei. Although in this regions close to the stability line the ground states are predominantly spherical or oblate, at higher values of spin well developed rotational bands are present. This happens in particular when the intruder ... More
Presented by Dr. Piotr BEDNARCZYK on 14 Mar 2018 at 11:15 AM
Type: Poster
Exotic nuclei (halo & hypernuclei) are highly unstable nuclear system exhibit rare phenomena which provide an extreme test for the models of nuclear structure. Objective of the present work is to calculate the binding energy and some other observables for exotic hypernuclei like 4ΣHe, 8ΞHe, 11ΞB etc. For such hypernuclei three-body Schrodinger equation for realistic potentials provides a natur ... More
Presented by Mr. MURSHID ALAM
An important observation common in strip detectors is the cross-talk occurring between its different strips due to electronic coupling between them. In the present work this has been investigated for a planar HPGe strip detector, proposed to be used in the g-array for the DEcay SPECtroscopy [1] measurements at the upcoming FAIR [2] facility. The effect of cross-talk on the summed energy signal fro ... More
Presented by Dr. C.S. PALSHETKAR on 13 Mar 2018 at 2:00 PM
Type: Poster
The study of neutron-deficient Kr isotopes in the mass range A=70-80, which is in the transitional region [1], is quite interesting because these isotopes show different structures and particularly in $^{76}Kr$ shape co-existence near the ground state was observed [2, 3]. In present work, the multi-quasiparticle triaxial projected shell model (TPSM) approach [4-6] is employed to study the high spi ... More
Presented by Ms. N. BEHERA
Type: Poster
Global aspects of stellar object, such as the mass-radius elation, are determined by the equations of hydrostatic equilibrium,known as TOV(Tolman-Oppenheimer-Volkov) equations. A few exact solutions are known for a realistic pressure−density relation (equation of state,EOS) .These equations must be numerically solved to obtain the M−R relation. From EOS a family of different astronomical model ... More
Presented by SHAMIM HAQUE MONDAL
Type: Poster
Transitional nuclei in mass A~140 region are crucial laboratory to observe the interesting nuclear structure phenomena and to test variety of nuclear models. Due to the proximity of the spherical shell closures and competing shape (prolate and oblate) driving effects of the high-j (h1l/2 ) orbital near the proton and neutron Fermi levels, several novel phenomena, like shape co-existence, shears m ... More
Presented by Dr. H PAI, Mr. Sajad ALI
Type: Poster
There are four proton holes and a number of neutron particles lie in the upper part of the g 9/2 proton orbital and in the middle part of the d 5/2, g 7/2 neutron orbital respectively in Pd nuclei. A number of rotational bands based on quasi neutron particles, antimagnetic rotational bands associated with proton holes and neutron particles were reported in 100,101,104Pd nucleus [1,2,3,4]. In previ ... More
Presented by Ms. Chandrani MAJUMDER
Type: Invited Talk
Nuclear fission is a complex process, which – after almost 80 years since its discovery – is still not fully understood. One field of research is for instance studies of the de-excitation process of fission fragments, which in the early stages, i.e. within a few nanoseconds after scission, takes place through the successive emission of prompt neutrons and gamma rays. For nuclear applications, ... More
Presented by Prof. Andreas OBERSTEDT on 13 Mar 2018 at 3:30 PM
Type: Poster
The nuclei in the mid shell region of A=180-190 have moderate deformation and show rotational-like band structures built on different single particle configurations. Many of these nuclei are also known to have gamma-softness. Prior to the present study, the high spin structure of 187Os was little known although, band structures built on different configurations and band crossings were studied in t ... More
Presented by Mr. SOUMEN NANDI
Type: Poster
A systematic study of the “flat” SD bands of odd-A isotopes of Pb is done by using the two parameter exponential model with pairing attenuation. The least-squares fitting procedure is employed to extract the fitting parameters of the 9 superdeformed bands of the Pb isotopes which show almost constant variation of the dynamic moment of inertia with rotational frequency. The effective pairing pa ... More
Type: Invited Talk
The light rare-earth nuclei near N = 90, are textbook examples (Refs. 1-10) of the evolution of nuclear structure with excitation energy and angular momentum. They display a variety of different phenomena, such as, multiple backbends, dramatic prolate to oblate shape changes associated with band termination plus a spectacular return to collectivity extending discrete gamma-ray spectroscopy int ... More
Presented by Dr. M. RILEY on 12 Mar 2018 at 11:00 AM
Type: Poster
Many nuclei near mass 130- with two nearly degenerate bands- were earlier established to have Chiral symmetry. But the electromagnetic selection rules for the inter-band and intra-band transitions provide the stringent criteria for the bands to be qualified as Chiral [1, 2]. The reduced transition probabilities, the B(E2) values follow the identical pattern for the two Chiral bands, whereas the ... More
Presented by Mr. Himanshu Kumar SINGH
Type: Poster
Neutron rich Ti isotopes are particularly interesting because they exist with two proton excess near the proton magic number 20. Since the nuclei in excited state will be hot rotating due to higher agitation of nucleons (higher internal excitation), a temperature of optimum value is included in the suitable statistical model and the excited levels are calculated. The Eγ values obtained from these ... More
Presented by Mrs. Preetha P
Type: Poster
Nuclei located on or close to the N = Z line have been generated a considerable interest during the last few years. This region gives us a unique opportunity to investigate the fundamental problems in nuclear physics like isospin symmetry of the nuclear interaction. The isospin T is a good quantum number under the fundamental assumptions of charge symmetry and charge independence of the strong nuc ... More
Presented by Dr. Abhijit BISOI
on 12 Mar 2018 at 9:30 AM
Type: Invited Talk
Wobbling of triaxial even-even nuclei represents the quantized oscillations of the principal axes of an asymmetric top relative to the space-fixed angular momentum vector or, in the body fixed frame of reference, the oscillations of the angular momentum vector about the axis of the largest moment of inertia [1]. In transverse wobbling, the odd quasiproton, with predominantly particle nature, align ... More
Presented by Prof. U. GARG on 14 Mar 2018 at 10:15 AM
Type: Poster
The g-factor of an isomeric state at 2738 keV in $^{135}$La has been measured by time differential angular distribution technique. This isomer was populated in the reaction $^{11}$B($^{128}$Te,4n)$^{135}$La at beam energy of 52 MeV. The half-life of the state, 25.3(3)ns, has been remeasured. The measured value of the g-factor, -0.050(5), has been compared with the model calculations to firmly assi ... More
Presented by Mr. Md. Sazedur LASKAR
Type: Poster
Our recently proposed generalized seniority scheme has been widely successful in explaining the reduced transition probabilities of high spin isomers and other excited states in semi-magic nuclei [1-5]. In the present paper, we use this formalism to obtain the g-factors of semi-magic nuclei, particularly for Sn and Pb isotopes. We find that the magnetic moment and the g-factor values do show a par ... More
Presented by Dr. Bhoomika MAHESHWARI