Abstract
We observed the 19 keV neutron decay from the 3.388-MeV state of by measuring -neutron coincidences in colinear geometry at several angles. The ratio of this yield to the yield of particle-stable nuclei is a measure of the excitation energy of fragments produced in the reaction. The extreme kinematic focusing of the 19-keV decay enabled us to obtain the dependence of this ratio on fragment kinetic energy. For nuclei emitted with kinetic energies MeV the ratio is surprisingly constant; for nuclei of higher kinetic energy it decreases monotonically.
- Received 3 August 1988
DOI:https://doi.org/10.1103/PhysRevC.39.733
©1989 American Physical Society