Nuclear structure of Lu178

D. G. Burke, P. C. Sood, P. E. Garrett, Tao Qu, R. K. Sheline, and R. W. Hoff
Phys. Rev. C 47, 131 – Published 1 January 1993
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Abstract

The Hf179(t)178Lu reaction has been studied using beams of 17 MeV tritons from the McMaster University tandem Van de Graaff accelerator. Reaction products were analyzed with a magnetic spectrograph, and the resolution achieved for the alpha spectra was ∼20 keV (FWHM). Two-quasiparticle states in Lu178 involving the 9/2+[624] target neutron coupled with the 7/2+[404], 9/2[514], and 1/2+[411] proton orbitals were identified. The difference in ground-state (t,α) Q values for Hf178 and Hf179 components of the target, combined with the known masses of Lu177, Hf178, and Hf179, yields an improved value of -50 351±5 keV for the mass excess of Lu178. This result, combined with the two-quasiparticle assignments from the present work, has resolved the long-standing puzzle concerning the character and excitation energy of the well-known 23 min high-spin beta-decaying isomer in Lu178.

  • Received 28 July 1992

DOI:https://doi.org/10.1103/PhysRevC.47.131

©1993 American Physical Society

Authors & Affiliations

D. G. Burke, P. C. Sood, P. E. Garrett, and Tao Qu

  • Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4K1

R. K. Sheline

  • Departments of Chemistry and Physics, Florida State University, Tallahassee, Florida 32306

R. W. Hoff

  • Nuclear Chemistry Division, Lawrence Livermore National Laboratory, Livermore, California 94550

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Vol. 47, Iss. 1 — January 1993

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