FIZIKA B 12 (2003)  2, 85 - 96

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J. H. HAMILTONa, S. J. ZHUa,b,c, Y. X. LUOa,c,d, J. K. HWANGa,
A. V. RAMAYYAa, P. M. GORE, J. O. RASMUSSENc and GANDS collaborations

aPhysics Department, Vanderbilt University, Nashville, TN 37235, U. S. A.
bDepartment of Physics, Tsinghua University, Beijing 100084, China
cJoint Institute for Heavy Ion Research, Oak Ridge, TN 37830, U. S. A.
dLawrence Berkeley National Laboratory, Berkeley, CA 94720, U. S. A.

Paper devoted to honour the memory of Professor Nikola Cindro

Received 14 March 2002;    revised manuscript received 26 February 2003
Accepted 10 March 2003    Online 3 March 2004

The neutron-rich nuclei of 104,106Mo, 139,141Ba, 139Xe, 115,117Ag and 133,135Te have been studied by using the spontaneous fission source of 252Cf with the Gammasphere array. In the present work, the collective and single-particle structures in these neutron-rich nuclei have been reported. Gamma-type vibrational bands in 104,106Mo, particle and hole states, including candidates for tilted rotor bands in 133,135Te and a 7/2[413] rotational band in both 115,117Ag have been observed. The N=83 135Te and 139Ba show marked differences associated with differences in their particle and hole states. New levels in 141Ba and 139Xe extend evidence for two opposite-parity doublets characteristic of stable octupole deformation.

PACS numbers: 21.10.-k, 27.60.+j, 25.85.Ca, 21.60.Cs
UDC 539.165

Keywords: neutron-rich nuclei, fission, tilted rotor bands, particle-hole states

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