Abstract
The observed mass distribution for thermal-neutron-induced fission of is strongly symmetric, whereas that for spontaneous fission of is found to be predominantly asymmetric with, however, some symmetric fission present. The mass distributions were derived from energy measurements on coincident fission fragments. The onset of symmetric fission at supports theories relating asymmetric fission to the second hump of the fission barrier.
- Received 14 May 1971
DOI:https://doi.org/10.1103/PhysRevLett.27.45
©1971 American Physical Society