Evolution of the N=82 shell gap below 132Sn inferred from core excited states in 131In

Górska, M., Cáceres, L., Grawe, H., Pfützner, M., Jungclaus, A., Pietri, S., Werner-Malento, E., Podolyák, Z., Regan, P.H., Rudolph, D., Detistov, P., Lalkovski, S., Modamio, V., Walker, J., Beck, T., Bednarczyk, P., Doornenbal, P., Geissel, H., Gerl, J., Grëbosz, J., Hoischen, R., Kojouharov, I., Kurz, N., Prokopowicz, W., Schaffner, H., Weick, H., Wollersheim, H.J., Andgren, K., Benlliure, J., Benzoni, G., Bruce, Alison, Casarejos, E., Cederwall, B., Crespi, F.C.L., Hadinia, B., Hellström, M., Ilie, G., Khaplanov, A., Kmiecik, M., Kumar, R., Maj, A., Mandal, S., Montes, F., Myalski, S., Simpson, G.S., Steer, S.J., Tashenov, S., Wieland, O., Dombrádi, Zs., Reiter, P. and Sohler, D. (2009) Evolution of the N=82 shell gap below 132Sn inferred from core excited states in 131In Physics Letters B, 672 (4-5). pp. 313-316. ISSN 0370-2693

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The γ-ray decay of an excited state in 131In, the one proton hole neighbor of the doubly magic 132Sn has been measured. A high-spin, core-excited isomer with T1/2=630(60) ns was identified following production by both relativistic fragmentation of a 136Xe beam and fission of a 238U beam. This state deexcites by a single γ-ray branch of 3782(2) keV from which direct evidence for the size of the N=82 shell gap is inferred. The results are discussed in comparison to a shell-model calculation including configurations across the closed shells at N=82 and Z=50.

Item Type: Journal article
Subjects: F000 Physical Sciences > F300 Physics
DOI (a stable link to the resource): 10.1016/j.physletb.2009.01.027
Faculties: Faculty of Science and Engineering > School of Computing, Engineering and Mathematics > Engineering and Product Design Research > Nuclear Physics
Depositing User: editor environment
Date Deposited: 09 Mar 2009
Last Modified: 13 Mar 2015 14:17
URI: http://eprints.brighton.ac.uk/id/eprint/5558

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