Статья

Spontaneous-fission half-lives for even nuclei with<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi><mml:mo>≥</mml:mo><mml:mn>92</mml:mn></mml:math>

J. RandrupLawrence Berkeley Laboratory, University of California, Berkeley, California 94720S.E. LarssonLawrence Berkeley Laboratory, University of California, Berkeley, California 94720P. MöllerLawrence Berkeley Laboratory, University of California, Berkeley, California 94720Sven Gösta NilssonLawrence Berkeley Laboratory, University of California, Berkeley, California 94720K. PomorskiLawrence Berkeley Laboratory, University of California, Berkeley, California 94720A. SobiczewskiLawrence Berkeley Laboratory, University of California, Berkeley, California 94720

1976lv

ABI

Аннотация

The spontaneous-fission process for doubly even nuclei with $Z\ensuremath{\ge}92$ 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 $\mathfrak{r}$ process and superheavy nuclei are encountered.NUCLEAR STRUCTURE Even nuclei with $Z\ensuremath{\ge}92$; calculated sf ${T}_{\frac{1}{2}}$.

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Идентификаторы

DOI: 10.1103/physrevc.13.229

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