Abstract
Background: The process of -delayed fission provides a versatile tool to study low-energy fission in nuclei far away from the -stability line, especially for nuclei which do not fission spontaneously.
Purpose: The aim of this paper is to investigate systematic trends in partial half-lives.
Method: A semi-phenomenological framework was developed to systematically account for the behavior of partial half-lives.
Results: The partial half-life appears to exponentially depend on the difference between the value for decay of the parent nucleus and the fission-barrier energy of the daughter (after decay) product. Such dependence was found to arise naturally from some simple theoretical considerations.
Conclusions: This systematic trend was confirmed for experimental partial half-lives spanning over seven orders of magnitude when using fission barriers calculated from either the Thomas-Fermi or the liquid-drop fission model. The same dependence was also observed, although less pronounced, when comparing to fission barriers from the finite-range liquid-drop model or the Thomas-Fermi plus Strutinsky integral method.
- Received 30 January 2015
DOI:https://doi.org/10.1103/PhysRevC.91.044314
©2015 American Physical Society