New supersymmetry classification of nuclear levels in Pt195

A. Mauthofer, K. Stelzer, J. Gerl, Th. W. Elze, Th. Happ, G. Eckert, T. Faestermann, A. Frank, and P. Van Isacker
Phys. Rev. C 34, 1958 – Published 1 November 1986
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Abstract

The Coulomb excitation of Pt195 by 125 MeV S32 projectiles has been studied using γ ray spectroscopic techniques. On the basis of supersymmetry considerations, the observation of new levels, B(E2) ratios, and B(E2) values, a new assignment of negative-parity states within the U(6/12) multi-j supersymmetry scheme of the interacting-boson-fermion model is proposed for the 〈σ1,σ2,σ3〉-(τ 1,τ2)=〈7,0,0〉-(2 ,0) and 〈6,1,0〉-(2,0) quadruplets. With this classification the simultaneous description of the low lying Pt195 and Pt194 levels within the framework of the supersymmetry scheme is greatly improved. The predicted E2 branching ratios for the decay of the (τ1,τ2)-L=(2,0)-4 levels in Pt195 are well reproduced, while for the decay of the (2,0)-2 levels discrepancies occur in both the new and the old classification.

  • Received 9 July 1986

DOI:https://doi.org/10.1103/PhysRevC.34.1958

©1986 American Physical Society

Authors & Affiliations

A. Mauthofer, K. Stelzer, J. Gerl, Th. W. Elze, Th. Happ, and G. Eckert

  • Institut für Kernphysik, Universitat Frankfurt, Frankfurt am Main, Federal Republic of Germany

T. Faestermann

  • Technische Universitat München, München, Federal Republic of Germany

A. Frank

  • Physics Department, Yale University, New Haven, Connecticut 06511

P. Van Isacker

  • University of Sussex, Brighton, Sussex BN1?H, United Kingdom

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Issue

Vol. 34, Iss. 5 — November 1986

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