12-14 March 2018
TIFR, Mumbai
Asia/Kolkata timezone
FIG 2018
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Possibility of wobbling excitation in the even-even 142Gd nucleus
Presented by Dr. Subhendu RAJBANSHI
Type: Poster
Content
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 chirality are regarded as fingerprints of stable triaxial nuclei. Evidence for wobbling (collectively enhanced E2 transitions between the one- and
zero-phonon rotational bands) has been observed only in odd-A triaxial strongly deformed nuclei around Z ~ 72, N ~ 94 though, Bohr and Mottelson had predict it for the triaxial even-even nuclei many years ago.
A recent study on the even-even 138Nd nucleus hints that wobbling mode may exist in the low and medium spin triaxial deformed states. Similar evidence of the triaxial deformed band has been explored above the 10+ excited state in 142Gd. To investigate the possibility of wobbling mode in 142Gd above this state an experiment has been performed at TIFR, Mumbai in which the nucleus of interest populated with ~ 35% of the total cross-section. The newly observed connecting transitions and their electromagnetic properties are similar to those of wobbling excitation but yet not confirmed. This will be discussed in details.
Place
Location: TIFR, Mumbai
Room: AG66
Primary authors
- Dr. Subhendu RAJBANSHI Department of Physics, Dum Dum Motijheel College, Dum Dum
Co-authors
- Dr. Haridas PAI SINP
- Prof. Asimananda GOSWAMI Saha Institute of Nuclear Physics
- Mr. SAJAD ALI SENIOR RESEARCH FELLOW
- Prof. R. PALIT Tata Institute of Fundamental Research