Spontaneous-fission half-lives for even nuclei with Z> or =92
The spontaneous-fission process for doubly even nuclei with Z> or =92 is studied in a semiempirical 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) inertial 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. (AIP)
- Research Organization:
- Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-33-027735
- OSTI ID:
- 4093976
- Journal Information:
- Phys. Rev., C, v. 13, no. 1, pp. 229-239, Journal Name: Phys. Rev., C, v. 13, no. 1, pp. 229-239; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Theoretical estimates of spontaneous-fission half-lives for superheavy elements based on the modified-oscillator model
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