Second minimum lifetime measurements in Nd133 and Nd137

S. M. Mullins, I. Jenkins, Y-J. He, A. J. Kirwan, P. J. Nolan, J. R. Hughes, R. Wadsworth, and R. A. Wyss
Phys. Rev. C 45, 2683 – Published 1 June 1992
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Abstract

The quadrupole moments (Q0) of the highly deformed, second minimum bands in Nd133 and Nd137 have been extracted from mean lifetime measurements using the Doppler shift attenuation method. The reactions Pd105(32S,2p2n)133Nd at 152 MeV and Ru104(36S,3n)137Nd at 145 MeV were used. A standard centroid shift analysis was carried out in both cases, which gave values of Q0=(6.0±0.7)e b and (4.0±0.5)e b for Nd133 and Nd137, respectively, corresponding to axial prolate deformations of β2≃0.33 and ≃0.22. A line-shape analysis was also carried out for Nd133 to check against the possible effect of sidefeeding. The result was Q0=(6.7+0.7)e b, with sightly slower sidefeeding times corresponding to Qsf¯≃5.3e b. The results are in good agreement with the predictions of total Routhian surface calculations, and are discussed in the context of other highly deformed bands in the A=130–140 mass region.

  • Received 3 September 1991

DOI:https://doi.org/10.1103/PhysRevC.45.2683

©1992 American Physical Society

Authors & Affiliations

S. M. Mullins, I. Jenkins, Y-J. He, A. J. Kirwan, and P. J. Nolan

  • Oliver Lodge Laboratory, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, United Kingdom

J. R. Hughes and R. Wadsworth

  • Department of Physics, University of York, Heslington, York Y01 5DD, United Kingdom

R. A. Wyss

  • Joint Institute for Heavy Ion Research, Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge, Tennessee 37831

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Vol. 45, Iss. 6 — June 1992

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