Strong gamma-ray emission from neutron unbound states populated in beta-decay: Impact on (n,gamma) cross-section estimates
Yazar
Reponen, M.
Hakala, J.
Jokinen, A.
Jordan, M. D.
Kankainen, A.
Kolhinen, V. S.
Kondev, F. G.
Koponen, J.
Lebois, M.
Martinez, T.
Mason, P.
Mendoza, E.
Monserrate, M.
Montaner-Piza, A.
Moore, I.
Nacher, E.
Orrigo, S. E. A.
Penttila, H.
Podolyak, Zs.
Pohjalainen, I.
Porta, A.
Regan, P. H.
Reinikainen, J.
Tain, J. L.
Guadilla, V.
Valencia, E.
Algora, A.
Zakari-Issoufou, A. -A.
Rice, S.
Le Meur, L.
Agramunt, J.
Aysto, J.
Batist, L.
Bowry, M.
Briz, J. A.
Bui, V. M.
Caballero-Folch, R.
Cano-Ott, D.
Cucoanes, A.
Elomaa, V. -V.
Eronen, T.
Estevez, E.
Estienne, M.
Fallot, M.
Farrelly, G. F.
Fraile, L. M.
Garcia, A. R.
Gelletly, W.
Gomez-Hornillos, B.
Gorelov, D.
Gorlychev, V.
Rinta-Antila, S.
Rissanen, J.
Rubio, B.
Rytkonen, K.
Shiba, T.
Sonnenschein, V.
Sonzogni, A. A.
Vedia, V.
Voss, A.
Wilson, J. N.
Ganioglu, Ela
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Total absorption gamma-ray spectroscopy is used to measure accurately the intensity of gamma emission from neutron-unbound states populated in the beta-decay of delayed-neutron emitters. From the comparison of this intensity with the intensity of neutron emission one can deduce information on the (n,gamma) cross section for unstable neutron-rich nuclei of interest in r process abundance calculations. A surprisingly large gamma branching was observed for a number of isotopes. The results are compared with Hauser-Feshbach calculations and discussed.
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