Nuclear Structure of Rhenium-186 Revealed by Neutron-Capture Gamma Rays
Abstract
The total radiative thermal neutron-capture cross section of 185Re(n,gamma) was calculated from measurements of its gamma-ray spectrum following irradiation of a highly enriched 185Re target in the guided thermal-neutron beam at the Budapest Research Reactor. The cross section was obtained by first summing the experimentally measured partial gamma ray-production cross sections associated with the known ground-state transitions below 323 keV. Combined with the contribution to ground-state population from the quasi-continuum, which was generated by the DICEBOX statistical-decay code, the resulting thermal neutron-capture cross section was determined to be 84(6) b. This result is statistically comparable to previous works. Additionally, 12 levels and 54 primary transitions were newly identified in this work via the binding-energy test, thus improving the decay scheme. All observed primary transitions populating levels below 865 keV were used to perform an independent measurement of the neutron-separation energy, which was found to be 6179.45(30) keV. This result is also consistent with measurements made in previous works and with the adopted neutron-separation energy of 6179.7(7) keV.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2014
- Accession Number
- ADA598969
Entities
People
- Andrew G. Lerch
Organizations
- Air Force Institute of Technology