Spontaneous-fission half-lives for even nuclei with Z92

J. Randrup, S. E. Larsson, P. Möller, S. G. Nilsson, K. Pomorski, and A. Sobiczewski
Phys. Rev. C 13, 229 – Published 1 January 1976
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Abstract

The spontaneous-fission process for doubly even nuclei with Z92 is studied in a semi-empirical WKB framework. One-dimensional fission barrier potentials are established from theoretical deformation-energy surfaces based on the droplet model and the modified-oscillator model. The effects of axial asymmetry as well as reflection asymmetry have been taken into account. Macroscopic (irrotational flow) inertial-mass functions and alternatively microscopic (cranking model) intertial mass parameters have been employed for the calculation of the fission half-lives. With one over-all normalization parameter it is possible to fit the experimental half-lives to within a factor of 20 on the average. The resulting effective inertial-mass functions are used to estimate the stability of the transactinide elements. Only minor differences with previous estimates for the r process and superheavy nuclei are encountered.

NUCLEAR STRUCTURE Even nuclei with Z92; calculated sf T12.

  • Received 22 September 1975

DOI:https://doi.org/10.1103/PhysRevC.13.229

©1976 American Physical Society

Authors & Affiliations

J. Randrup*

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

S. E. Larsson, P. Möller, and S. G. Nilsson

  • Department of Mathematical Physics, Lund Institute of Technology, Lund, Sweden

K. Pomorski

  • Institute of Physics, Maria Sklodowska-Curie University, Lublin, Poland

A. Sobiczewski

  • Institute for Nuclear Research, Hoza 69, PL-00681 Warszawa, Poland

  • *On leave from the University of Aarhus, Aarhus, Denmark.

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Vol. 13, Iss. 1 — January 1976

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