Evidence for Intermediate-State Structure from Resonance Neutron Capture inRe185andRe187

Abstract
Measurements have been made on the high-energy capture γ rays associated with neutron resonances in the target nuclides Re185 and Re187 using an integral bias level of 4 MeV. The Re187 data show nonstatistical behavior, indicating the influence of at least one extremely narrow intermediate state, with a width of only about 30 eV.