Correlation Studies of Rotational Behavior at Very High Angular Momentum

M. A. Deleplanque; F. S. Stephens; O. Andersen; J. D. Garrett; B. Herskind; R. M. Diamond; C. Ellegaard; D. B. Fossan; D. L. Hillis; H. Kluge; M. Neiman; C. P. Roulet; S. Shih; R. S. Simon

doi:10.1103/PhysRevLett.45.172

Correlation Studies of Rotational Behavior at Very High Angular Momentum

M. A. Deleplanque, F. S. Stephens, O. Andersen, J. D. Garrett, B. Herskind, R. M. Diamond, C. Ellegaard, D. B. Fossan, D. L. Hillis, H. Kluge, M. Neiman, C. P. Roulet, S. Shih, and R. S. Simon

Phys. Rev. Lett. 45, 172 – Published 21 July 1980

Abstract

Transition-energy correlations are studied in rotational erbium nuclei up to 1250 keV. A collective moment of inertia $I_{c}$ corresponding to in-band transitions is directly deduced from the data and compared to the effective moment of inertia, $I_{eff}$ , deduced from multiplicity measurements. For $I \sim (30 - 45) ℏ$ it is found that $I_{c}$ is 25-50% smaller than $I_{eff}$ , which suggests an important contribution to the total spin from a few aligned particles. This description implies band crossings for which there is independent evidence.

Received 8 January 1980

DOI:https://doi.org/10.1103/PhysRevLett.45.172

Authors & Affiliations

M. A. Deleplanque^*, F. S. Stephens^†, O. Andersen, J. D. Garrett, and B. Herskind

The Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark

R. M. Diamond, C. Ellegaard^‡, D. B. Fossan^§, D. L. Hillis, H. Kluge^∥, M. Neiman^‡, C. P. Roulet^*, and S. Shih^¶

Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

R. S. Simon

Gesellschaft für Schwerionenforschung, Darmstadt, West Germany

^*Permanent address: Institut de Physique Nucléaire, B. P. No. 1, 91406 Orsay, France.
^†Permanent address: Lawrence Berkeley Laboratory, Berkeley, Cal. 94720.
^‡Permanent address: Niels Bohr Institutet, Risø, DK-4000 Roskilde, Denmark.
^§Permanent address: State University of New York at Stony Brook, Stony Brook, N.Y. 11794.
^∥Permanent address: Hahn-Meitner-Institut für Kernforschung Berlin, D-1000 Berlin 39, West Germany.
^¶Permanent address: Institute of Nuclear Research, Shanghai, People's Republic of China.