Distribution of Spontaneous Fission Fragments in Nuclear Astrophysical Problems
Abstract
Empirical equations for the estimation of fission fragment yield are proposed. These equations can be applied to all nuclides in the nuclidic region of 208≲A andZ 2/A<40.2, and they can explain experimental results within an accuracy of 20%. By applying these empirical equations to nuclear astrophysics, the contribution of fission fragments to nuclidic abundance in the mass region of 100≲A≲170 is estimated, in which mass region the fission fragments from fissioning nuclei withA>250 accumulate. These nuclei withA>250 are produced byr-process and make delayed spontaneous fissions duringr-process cooling. Furthermore, a possibility is proposed that the anomalously high abundance of medium weight elements observed in some peculiar A stars may be the accumulation of the fission fragments from the fissioning nuclei in 250≲A≲265.
- Publication:
-
Astrophysics and Space Science
- Pub Date:
- May 1975
- DOI:
- 10.1007/BF00644802
- Bibcode:
- 1975Ap&SS..34..321O
- Keywords:
-
- Abundance;
- Astrophysics;
- Fission Products;
- Nuclear Astrophysics;
- Nuclear Fission;
- A Stars;
- Heavy Nuclei;
- Mass Distribution;
- Mathematical Models;
- Meteoritic Composition;
- Neutron Emission;
- Solar System;
- Astrophysics