Shape-Driving Effects in the Triaxial Nucleus, Xe-128
Orce, J N, Bruce, A M, Emmanouilidis, A, Byrne, A P, Dracoulis, G D, Kibedi, T, Caamano, M, El-Masri, H, Pearson, C J, Podolyak, Z, Stevenson, P D, Walker, P M, Xu, F R, Cullen, D M and Wheldon, C (2006) Shape-Driving Effects in the Triaxial Nucleus, Xe-128 Physical Review C, 74 (3).
An extended decay scheme for Xe-128 has been constructed by using data from the Sn-124(Be-9, 5n)Xe-128 reaction at a beam energy of 58 MeV. Bands have been identified as being built on several intrinsic states, including a proposed 9/2(-) circle times 1/2(+) two-quasineutron configuration that forms the K-pi=5(-) intrinsic state at 2228 keV, and on a previously assigned K-pi=8(-) intrinsic state at 2786 keV. A half-life of 73(3) ns has been measured for the latter. Theoretical calculations have been performed by using the configuration-constrained blocking method based on a nonaxial Woods-Saxon potential. Large gamma deformation and gamma softness are predicted for the ground state and the K-pi=5(-) intrinsic state, whereas a nearly axially symmetric shape is predicted for the K-pi=8(-) two-quasiparticle configuration. The low value of the hindrance factor for the E1 transition depopulating the K-pi=8(-) intrinsic state is discussed in the context of analogous transitions in neighbouring N=74 isotones.
|Divisions :||Faculty of Engineering and Physical Sciences > Physics|
|Date :||1 January 2006|
|Identification Number :||10.1103/PhysRevC.74.034318|
|Additional Information :||Published in <i>Physical Review C,</i> Vol. 74, Iss. 3. Copyright 2006 American Physical Society. Click <a href=http://prc.aps.org/>here</a> to access the journal's website.|
|Depositing User :||Mr Adam Field|
|Date Deposited :||27 May 2010 14:08|
|Last Modified :||23 Sep 2013 18:27|
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