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 () bands in and one each in and . 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 proton and quasineutrons from the and or orbitals. There is good overall agreement for both the total angular momenta and reduced transition strengths. The deduced strengths, which are a sensitive probe of magnetic rotation, show a decrease consistent with TAC predictions for one band in and in , confirming the shears mechanism as the means of excitation. Furthermore, the staggering in the transition energies in and absence of regular sequences of transitions for suggest that is the lower boundary for the appearance of the shears mechanism in this mass region.
- Received 9 January 2006
DOI:https://doi.org/10.1103/PhysRevC.73.034313
©2006 American Physical Society