Resolution of the nature of the coupling in subthreshold fission in 238U+n
Abstract
The analysis of a recent high-resolution neutron capture measurement at 152 m has provided the first evidence that the strong fission resonance at 721 eV is a class-II resonance. This conclusion is based on the measured capture width of 4.7+/-0.6 meV, which is considerably smaller than the average capture width of 23.5 meV for the neighboring resonances. Furthermore, after analyzing the fission widths for the 721- and 1211-eV clusters, we conclude for the Jπ=1/2+ fission barrier in 239U that the inner barrier is lower than the outer barrier by ~1.5 MeV.
- Publication:
-
Physical Review C
- Pub Date:
- January 1986
- DOI:
- 10.1103/PhysRevC.33.125
- Bibcode:
- 1986PhRvC..33..125A