Prolate-Spherical Shape Coexistence at N=28 in S-44

0347718 - ÚJF 2011 RIV US eng J - Článek v odborném periodiku
Force, C. - Grévy, S. - Gaudefroy, L. - Sorlin, O. - Caceres, L. - Rotaru, F. - Mrázek, Jaromír - Achouri, N. L. - Angelique, J. C. - Azaiez, F. - Bastin, B. - Borcea, R. - Buta, A. - Daugas, J. M. - Dlouhý, Zdeněk - Dombradi, Z. - De Oliveira, F. - Negoita, F. - Peniozhkevich, Y. - Saint-Laurent, M. G. - Sohler, D. - Stanoiu, M. - Stefan, I. - Stodel, C. - Nowacki, F.
Prolate-Spherical Shape Coexistence at N=28 in S-44.
Physical Review Letters. Roč. 105, č. 10 (2010), 102501/1-102501/4. ISSN 0031-9007. E-ISSN 1079-7114
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: ELECTRIC-MONOPOLE TRANSITIONS * SHELL CLOSURE * O-2(+) STATE
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 7.621, rok: 2010

The structure of S-44 has been studied by using delayed gamma and electron spectroscopy. The decay rates of the 0(2)(+) isomeric state to the 2(1)(+) and 0(1)(+) states, measured for the first time, lead to a reduced transition probability B(E2: 2(1)(+) --> 0(2)(+)) = 8.4(26) e(2) fm(4) and a monopole strength rho(2)(E0: 0(2)(+) --> 0(1)(+)) = 8.7(7) x 10(-3). Comparisons to shell model calculations point towards prolate-spherical shape coexistence, and a two-level mixing model is used to extract a weak mixing between the two configurations.
Trvalý link: http://hdl.handle.net/11104/0188436