Neutron capture reaction cross-section of Se through the Se( ) Reaction in Inverse Kinematics
N. Imai (Center for Nuclear Study, the University of Tokyo, Hirosawa 2-1, Wako, Japan)
; M. Dozono (Center for Nuclear Study, the University of Tokyo, Hirosawa 2-1, Wako, Japan); S. Michimasa (Center for Nuclear Study, the University of Tokyo, Hirosawa 2-1, Wako, Japan); T. Sumikama (RIKEN Nishina Center, Hirosawa 2-1, Wako, Japan); S. Ota (Center for Nuclear Study, the University of Tokyo, Hirosawa 2-1, Wako, Japan); et al - Show all 50 authors
γ emission probabilities from unbound states in $^{78,80}$Se, populated by a neutron-transfer reaction () on $^{77,79}$Se nuclei in inverse kinematics, were measured by directly detecting reaction residues. Assuming the spin distribution at the respective excitation energy of the unbound state, the cross-sections of the $^{79}$Se()$^{80}$Se reaction were evaluated using the γ emission probabilities. The surrogate-ratio method with the experimental γ emission probabilities of $^{78,80}$Se was also employed to deduce the cross-sections of $^{79}$Se() reaction by incorporating the theoretical evaluations of the neutron-capture reaction on the isomeric state in $^{77}$Se. Our two cross-sections are in good agreement with existing nuclear data compilations for the neutron-capture reaction on $^{79}$Se. The presented method contributes to the body of existing knowledge by providing approaches for determining the neutron capture cross-sections of radioactive nuclei at various neutron energies.