Octupole Deformation Bands of πh ll/2 in Neutron-Rich 145,147La Nuclei
ZHU Sheng-jiang1, WANG Mu-ge1, J. H. Hamilton2, A. V. Ramayya2, B. R. S. Babu2, W. C. Ma3, LONG Gui-lu1, ZHU Ling-yan, LI Ming1, A. Sakhaee1, GAN Cui-yun1
1Department of Physics, Tsinghua University, Beijing 100084
2Department of Physics, Vanderbilt University, Nashville, TN 37235, USA
3Department of Physics, Mississippi State University, MS 39762, USA
4Idaho National Engineering Laboratory, Idaho Falls, ID 83415, USA
5Lawrence Berkeley Laboratory, Berkeley, CA 94720, USA
6Joint Institute for Nuclear Research, Dubna 141980, Russia
Octupole Deformation Bands of πh ll/2 in Neutron-Rich 145,147La Nuclei
ZHU Sheng-jiang1;WANG Mu-ge1;J. H. Hamilton2;A. V. Ramayya2;B. R. S. Babu2;W. C. Ma3;LONG Gui-lu1;ZHU Ling-yan;LI Ming1;A. Sakhaee1;GAN Cui-yun1
1Department of Physics, Tsinghua University, Beijing 100084
2Department of Physics, Vanderbilt University, Nashville, TN 37235, USA
3Department of Physics, Mississippi State University, MS 39762, USA
4Idaho National Engineering Laboratory, Idaho Falls, ID 83415, USA
5Lawrence Berkeley Laboratory, Berkeley, CA 94720, USA
6Joint Institute for Nuclear Research, Dubna 141980, Russia
Abstract： Octupole deformation bands built on πh ll/2 orbital in neutron-rich odd-Z 145,147La nuclei have been investigated by measuring the prompt γ-rays emitted from the 252Cf source. The alternating parity band structures and strong E1 transitions observed between negative- and positive-parity bands in both nuclei indicate the octupole deformation enhanced by the h ll/2 single proton coupling. According to observed energy displacements the octupole deformation becomes stable at the intermediate spin states.
ZHU Sheng-jiang;WANG Mu-ge;J. H. Hamilton;A. V. Ramayya;B. R. S. Babu;W. C. Ma;LONG Gui-lu;ZHU Ling-yan;LI Ming;A. Sakhaee;GAN Cui-yun. Octupole Deformation Bands of πh ll/2 in Neutron-Rich 145,147La Nuclei[J]. 中国物理快报, 1999, 16(3): 169-171.
ZHU Sheng-jiang, WANG Mu-ge, J. H. Hamilton, A. V. Ramayya, B. R. S. Babu, W. C. Ma, LONG Gui-lu, ZHU Ling-yan, LI Ming, A. Sakhaee, GAN Cui-yun. Octupole Deformation Bands of πh ll/2 in Neutron-Rich 145,147La Nuclei. Chin. Phys. Lett., 1999, 16(3): 169-171.
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1999, Vol. 16 
