Elsevier

Physics Letters B

Volume 383, Issue 2, 29 August 1996, Pages 145-150
Physics Letters B

Shape change along the highly-deformed band in 137Nd

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Abstract

Lifetimes of states of the highly-deformed (HD) band in 137Nd have been measured using the Doppler shift attenuation method. A line-shape analysis has been carried out for individual states, resulting in transition quadrupole moments which decrease with increasing spin. This represents the first confirmation of previous total routhian surface (TRS) calculations that predicted a drift towards positive γ values of the HD minimum (at essentially constant β deformation). The lifetime data show a rather modest deformation of the HD band structure, indicating a softening of the nuclear potential at HD shape.

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The research of G.H. is supported in part by NSF Grant PHY95-07065, that of A.S. is supported in part by DOE grant DOE-91ER40618 and that of J.M. is supported in part by DOE grant DE-FG02-91ER40671.

1

Permanent address: Institute of Physics and Nuclear Engineering, Bucharest, Romania.

2

Instituto de Fisica, Universidade de São Paulo, São Paulo, Brazil.

3

Permanent address: China Institute of Atomic Energy, Beijing, China.

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