1. Structures of the neutron-rich nuclei observed in fission of 252Cf
- Author
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I. Y. Lee, C. J. Goodin, John O. Rasmussen, S. J. Zhu, S. H. Liu, J. K. Hwang, Y. X. Luo, N. J. Stone, N. T. Brewer, A. V. Ramayya, A. V. Daniel, and J. H. Hamilton
- Subjects
Nuclear physics ,Isotope ,Fission ,Chemistry ,Excited state ,Gammasphere ,Neutron ,Parity (physics) ,Atomic physics ,Multipole expansion ,Ground state - Abstract
Analysis of high statistics triple coincidence fission γ data from 252Cf at Gammasphere including angular correlations yielded well-expanded high-spin level schemes with more complete and reliable spin/parity assignments for 82Ge, 118,120,122Cd and 114,115Rh. Both the quasi-particle/hole couplings and quasi-rotational degrees of freedom are implied to play roles in these Cd isotopes. Evidence for triaxial shapes and octupole components in the Cd isotopes is presented. These Cd isotopes may have triaxial deformations. High-spin level schemes of 114,115Rh have been established for the first time. The existence of a relatively large signature splitting and an yrare band shows typical features of a triaxially deformed nucleus. Possible excited deformed rotational bands are observed, for the first time, in 82Ge. From the multipole mixing ratio measurement, the ground state configurations of 109,111Ru, as well as excited states in 103,107Mo and 111Ru were determined.
- Published
- 2014