Browsing by Author "Deepika Choudhury"

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Evidence of antimagnetic rotation in odd-A Cd105
(American Physical Society, 2010) Deepika Choudhury; A.K. Jain; M. Patial; N. Gupta; P. Arumugam; A. Dhal; R.K. Sinha; L. Chaturvedi; P.K. Joshi; T. Trivedi; R. Palit; S. Kumar; R. Garg; S. Mandal; D. Negi; G. Mohanto; S. Muralithar; R.P. Singh; N. Madhavan; R.K. Bhowmik; S.C. Pancholi
The lifetimes of the levels above spin 23/2⊃- in the negative-parity yrast band of Cd105 have been measured using the Doppler shift attenuation method. The obtained B(E2) values are small and show a decrease with an increase in spin. This establishes, for the first time, antimagnetic rotation (AMR) in an odd-A nucleus. An excellent agreement between the theoretical (semiclassical model) and experimental results along with a large I(2)/B(E2) ratio for the states strongly suggests that the structure of the levels beyond spin 23/2⊃- has the character of a twin-shears type AMR band resulting from the coupling of a pair of g9/2 proton holes with aligned h11/2 and (g7/2)2 neutron particles, along with a small contribution from the core rotation. © 2010 The American Physical Society.