Details

Autor(en) / Beteiligte

• Nyakó, B.M.
• Timár, J.
• Csatlós, M.
• Dombrádi, Zs
• Krasznahorkay, A.
• Kuti, I.
• Sohler, D.
• Tornyi, T.G.
• Czerwi ski, M.
• Rz ca-Urban, T.
• Urban, W.
• B czyk, P.
• Atanasova, L.
• Balabanski, D.L.
• Sieja, K.
• Blanc, A.
• Jentschel, M.
• Köster, U.
• Mutti, P.
• Soldner, T.
• de France, G.
• Simpson, G.S.
• Ur, C.A.

Titel

Medium-spin states of the neutron-rich 87,89Br isotopes: configurations and shapes

Ist Teil von

• Journal of physics. Conference series, 2016-06, Vol.724 (1)

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2016

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Medium-spin excited states of the neutron-rich 87Br and 89Br nuclei were observed and studied for the first time. They were populated in fission of 235U induced by the cold-neutron beam of the PF1B facility of the Institut Laue-Langevin, Grenoble. The measurement of γ radiation following fission has been performed using the EXILL array of Ge detectors. The observed level schemes were compared with results of large valence space shell model calculations. Both medium-spin level schemes consist of band-like structures, which can be understood as bands built on the πf5 2, πp3 2 and πg9 2 configurations. Both nuclei have 5 2− ground state spin-parity contrary to the odd-mass Br isotopes containing fewer neutrons, which have 3 2− ground state spin-parity. On the basis of the properties of the πg9 2 decoupled bands the deformations of the 87Br and 89Br fit to the systematics of nuclei in the region. 87Br is close to the vibrational limit, while 89Br is more rotational.