γ -ray decay from neutron-bound and unbound states in Mo 95 and a novel technique for spin determination

• Published in: Physical review. C 2016-02, Vol.93 (2), Article 024303
• Main Authors: Wiedeking, M., Krtička, M., Bernstein, L. A., Allmond, J. M., Basunia, M. S., Bleuel, D. L., Burke, J. T., Daub, B. H., Fallon, P., Firestone, R. B., Goldblum, B. L., Hatarik, R., Lake, P. T., Larsen, A. C., Lee, I.-Y., Lesher, S. R., Paschalis, S., Petri, M., Phair, L., Scielzo, N. D., Volya, A.
• Format: Article
• Language: English
• ISSN: 2469-9985; 0556-2813; 2469-9993; 1089-490X
• DOI: 10.1103/PhysRevC.93.024303

The emission of γ rays from neutron-bound and neutron-unbound states in 95 Mo , populated in the 94 Mo ( d , p ) reaction, has been investigated. Charged particles and γ radiation were detected with arrays of annular silicon and Clover-type high-purity Germanium detectors, respectively. Utilizing p− γ and p− γ − γ coincidences, the 95 Mo level scheme was greatly enhanced with 102 new transitions and 43 new states. It agrees well with shell model calculations for excitation energies below ≈ 2 MeV. From p− γ coincidence data, a new method for the determination of spins of discrete levels is proposed. The method exploits the suppression of high-angular momentum neutron emission from levels with high spins populated in the (d,p) reaction above the neutron separation energy. Spins for almost all 95 Mo levels below 2 MeV (and for a few levels above) have been determined with this method.