Spin-Dependent Triaxial Deformation in Neutron-Rich Mo Isotopes

A. G. Smith, J. L. Durell, W. R. Phillips, M. A. Jones, M. Leddy, W. Urban, B. J. Varley, I. Ahmad, L. R. Morss, M. Bentaleb, A. Guessous, E. Lubkiewicz, N. Schulz, and R. Wyss
Phys. Rev. Lett. 77, 1711 – Published 26 August 1996
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Abstract

The Eurogam-2 array has been used to study γ rays emitted following the spontaneous fission of a Cm248 source. Analysis of Doppler-broadened line shapes corresponding to decays from excited rotational states in neutron-rich Sr, Zr, and Mo fission fragments has enabled the first measurements of state lifetimes in these nuclei at around I=10. The results are consistent with a predicted rotation-induced change in the triaxiality of the yrast states of the Mo isotopes that contrasts with the more stable behavior observed in the Zr and Sr nuclei.

  • Received 21 December 1995

DOI:https://doi.org/10.1103/PhysRevLett.77.1711

©1996 American Physical Society

Authors & Affiliations

A. G. Smith, J. L. Durell, W. R. Phillips, M. A. Jones, M. Leddy, W. Urban, and B. J. Varley

  • Department of Physics and Astronomy, University of Manchester, M13 9PL, United Kingdom

I. Ahmad and L. R. Morss

  • Argonne National Laboratory, Argonne, Illinois 60439

M. Bentaleb, A. Guessous*, E. Lubkiewicz, and N. Schulz

  • Centre de Recherches Nucléaires, IN2P3-CNRS, Université Louis Pasteur, 67037 Strasbourg, France

R. Wyss

  • KTH, Physics Department Frescati, Frescativ. 24, S-104 05 Stockholm, Sweden

  • *Permanent address: University of Kenitra, Morocco.
  • Permanent address: Jagellonian University, Krakow, Poland.

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Vol. 77, Iss. 9 — 26 August 1996

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