Search of Anti-magnetic Rotation in odd-A nuclei in 110 mass region

The phenomenon of anti-magnetic rotation (AMR) is new and rare compared to the well established Magnetic Rotation (MR), giving rise to rotational like bands in nearly spherical nuclei. In A~110 nuclei (Z~50), the high-W g9/2 proton hole(s) and low-W h11/2, g7/2 neutrons play an important role favouring AMR. Firm experimental evidence of AMR has been reported in only three even-even Cd isotopes, namely 106,108,110Cd. We performed an experiment with the Indian National Gamma Array (INGA) at IUAC and by measuring the lifetimes (by using DSAM), and hence the B(E2) values of the states in the negative parity yrast band of 105Cd, we gave the first evidence of AMR being active in an odd A nucleus. The configuration assigned to the yrast band is h11/2(g7/2)2 (g9/2)-2. A recent calculation by Zhao et al., explained AMR in 105Cd in a self-consistent microscopic way confirming most of our interpretations. Proceeding forward, we performed an experiment with the INGA set-up at TIFR and measured the lifetimes of the high spin states (above 27/2+) in the positive parity signature partner bands 5 and 6 of the odd-A 107Cd nucleus by using the DSAM technique. We observed the existence of two AMR bands in an odd-A 107Cd nucleus built on g7/2(h11/2)2 neutron configuration. The increase in spin in these bands is due to the closing of a pair of g9/2 proton angular momentum vector towards the neutron angular momentum vector. We have performed semi-classical calculations to interpret the experimental results and study AMR. In my talk, I will give a brief description about the interesting phenomenon (AMR) and the important results obtained by us which confirm AMR in the odd-A 105,107Cd nuclei. With this I shall also briefly discuss about the SCM calculations for AMR and provide the future scope of this work