High-spin structure in 40K

P. A. Söderström, F. Recchia, J. Nyberg, A. Gadea, S. M. Lenzi, A. Poves, A. Ata, S. Aydin, D. Bazzacco, P. Bednarczyk, M. Bellato, B. Birkenbach, D. Bortolato, A. J. Boston, H. C. Boston, B. Bruyneel, D. Bucurescu, E. Calore, B. Cederwall, L. CharlesJ. Chavas, S. Colosimo, F. C.L. Crespi, D. M. Cullen, G. De Angelis, P. Désesquelles, N. Dosme, G. Duchêne, J. Eberth, E. Farnea, F. Filmer, A. Görgen, A. Gottardo, J. Grȩbosz, M. Gulmini, H. Hess, T. A. Hughes, G. Jaworski, J. Jolie, P. Joshi, D. S. Judson, A. Jungclaus, N. Karkour, M. Karolak, R. S. Kempley, A. Khaplanov, W. Korten, J. Ljungvall, S. Lunardi, A. Maj, G. Maron, W. Mȩczyski, R. Menegazzo, D. Mengoni, C. Michelagnoli, P. Molini, D. R. Napoli, P. J. Nolan, M. Norman, A. Obertelli, Zs Podolyak, A. Pullia, B. Quintana, N. Redon, P. H. Regan, P. Reiter, A. P. Robinson, E. Şahin, J. Simpson, M. D. Salsac, J. F. Smith, O. Stézowski, Ch Theisen, D. Tonev, C. Unsworth, C. A. Ur, J. J. Valiente-Dobón, A. Wiens

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Abstract

High-spin states of 40K have been populated in the fusion-evaporation reaction 12C(30Si,np)40K and studied by means of γ-ray spectroscopy techniques using one triple-cluster detector of the Advanced Gamma Tracking Array at the Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro. Several states with excitation energy up to 8 MeV and spin up to 10 have been discovered. These states are discussed in terms of J=3 and T=0 neutron-proton hole pairs. Shell-model calculations in a large model space have shown good agreement with the experimental data for most of the energy levels. The evolution of the structure of this nucleus is here studied as a function of excitation energy and angular momentum.

Original languageEnglish
Article number054320
JournalPhysical Review C - Nuclear Physics
Volume86
Issue number5
DOIs
StatePublished - Nov 27 2012
Externally publishedYes

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