Measurement of Capture Gamma Rays from 99 Tc Neutron Resonances at the J-PARC/ANNRI

Primary gamma rays from the neutron capture resonances for 99Tc were measured at the J-PARC/ANNRI. The transition pattern from the first resonance is similar to that from the capture reaction of thermal neutrons. On the other hand, transition patterns from the higher energy resonances are completely different, and there is no clear dependence on the spin-parities of the resonances.