Systematics of the shears mechanism in silver isotopes

A. Y. Deo, S. B. Patel, S. K. Tandel, S. Muralithar, R. P. Singh, R. Kumar, R. K. Bhowmik, S. S. Ghugre, A. K. Singh, V. Kumar, and Amita
Phys. Rev. C 73, 034313 – Published 20 March 2006

Abstract

A systematic investigation of the shears mechanism in silver isotopes has been carried out. Lifetimes have been measured by means of the Doppler-shift attenuation method for states in two magnetic dipole (M1) bands in Ag105 and one each in Ag103 and Ag106. Experimental total angular momenta and reduced transition strengths for these bands have been compared with the predictions of the tilted axis cranking (TAC) model with configurations involving one g9/2 proton and quasineutrons from the h11/2 and g7/2 or d5/2 orbitals. There is good overall agreement for both the total angular momenta and reduced transition strengths. The deduced B(M1) strengths, which are a sensitive probe of magnetic rotation, show a decrease consistent with TAC predictions for one M1 band in Ag105 and in Ag106, confirming the shears mechanism as the means of excitation. Furthermore, the staggering in the transition energies in Ag103 and absence of regular sequences of M1 transitions for N56 suggest that N=56 is the lower boundary for the appearance of the shears mechanism in this mass region.

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  • Received 9 January 2006

DOI:https://doi.org/10.1103/PhysRevC.73.034313

©2006 American Physical Society

Authors & Affiliations

A. Y. Deo*, S. B. Patel, and S. K. Tandel

  • Department of Physics, University of Mumbai, Vidyanagari, Mumbai 400 098, India

S. Muralithar, R. P. Singh, R. Kumar, and R. K. Bhowmik

  • Nuclear Science Centre, P.O. Box 10502, New Delhi 110 067, India

S. S. Ghugre

  • Inter-University Consortium for DAE Facilities, Calcutta 700 091, India

A. K. Singh

  • Department of Physics and Meteorology, IIT Kharagpur, Kharagpur 721 302, India

V. Kumar

  • Department of Physics, Panjab University, Chandigarh 160 014, India

Amita

  • Department of Physics, RBS College, Agra 282 002, India

  • *Electronic address: ajay@physics.mu.ac.in
  • Present address: Department of Physics and Applied Physics, University of Massachusetts, Lowell, MA-01854, USA.

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Issue

Vol. 73, Iss. 3 — March 2006

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