TY - JOUR
T1 - Barrier penetration and rotational damping of thermally excited superdeformed nuclei
AU - Yoshida, K.
AU - Matsuo, M.
AU - Shimizu, Y. R.
N1 - Funding Information:
We thank T. Døssing, E. Vigezzi and B. Herskind for valuable comments and discussion, and S. Leoni for useful discussion and providing us with the experimental data prior to publication. This work has been supported in part by the Grant-in-Aid for Scientific Research from the Japan Ministry of Education, Science and Culture (Nos. 10640267 and 12640281) and by the Special Research Grant-in-Aid of the Nara University.
PY - 2001/12/17
Y1 - 2001/12/17
N2 - We construct a microscopic model of thermally excited superdeformed states that describes both the barrier penetration mechanism, leading to the decay-out transitions to normal deformed states, and the rotational damping causing fragmentation of rotational E2 transitions. We describe the barrier penetration by means of a tunneling path in the two-dimensional deformation energy surface, which is calculated with the cranked Nilsson-Strutinsky model. The individual excited superdeformed states and associated E2 transition strengths are calculated by the shell-model diagonalization of the many-particle-many-hole excitations interacting with the delta-type residual two-body force. The effects of the decay-out on the excited superdeformed states are discussed in detail for 152Dy, 143Eu and 192Hg. The model predicts that the decay-out brings about a characteristic decrease in the effective number of excited superdeformed rotational bands.
AB - We construct a microscopic model of thermally excited superdeformed states that describes both the barrier penetration mechanism, leading to the decay-out transitions to normal deformed states, and the rotational damping causing fragmentation of rotational E2 transitions. We describe the barrier penetration by means of a tunneling path in the two-dimensional deformation energy surface, which is calculated with the cranked Nilsson-Strutinsky model. The individual excited superdeformed states and associated E2 transition strengths are calculated by the shell-model diagonalization of the many-particle-many-hole excitations interacting with the delta-type residual two-body force. The effects of the decay-out on the excited superdeformed states are discussed in detail for 152Dy, 143Eu and 192Hg. The model predicts that the decay-out brings about a characteristic decrease in the effective number of excited superdeformed rotational bands.
UR - http://www.scopus.com/inward/record.url?scp=0001941323&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0001941323&partnerID=8YFLogxK
U2 - 10.1016/S0375-9474(01)01123-X
DO - 10.1016/S0375-9474(01)01123-X
M3 - Article
AN - SCOPUS:0001941323
VL - 696
SP - 85
EP - 122
JO - Nuclear Physics A
JF - Nuclear Physics A
SN - 0375-9474
IS - 1-2
ER -