Shape isomerism and shape coexistence effects on the Coulomb energy differences in the N = Z nucleus As-66 and neighboring T=1 multiplets
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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| Data(s) |
14/10/2013
14/10/2013
2012
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| Resumo |
Excited states of the N = Z = 33 nucleus As-66 have been populated in a fusion-evaporation reaction and studied using gamma-ray spectroscopic techniques. Special emphasis was put into the search for candidates for the T = 1 states. A new 3(+) isomer has been observed with a lifetime of 1.1(3) ns. This is believed to be the predicted oblate shape isomer. The excited levels are discussed in terms of the shell model and of the complex excited Vampir approaches. Coulomb energy differences are determined from the comparison of the T = 1 states with their analog partners. The unusual behavior of the Coulomb energy differences in the A = 70 mass region is explained through different shape components (oblate and prolate) within the members of the same isospin multiplets. This breaking of the isospin symmetry is attributed to the correlations induced by the Coulomb interaction. Istituto Nazionale di Fisica Nucleare (INFN), Italy [AIC10-D-000568 bilateral action] US Department of Energy [DE-AC02-06CH11357, DE-FG02-88ER-40406] MICINN Spain [FPA2008-03774-E] UK STFC MICINN, Spain Generalitat Valenciana, Spain [FPA2008-06419, FPA2011-29854, PROMETEO/2010/101] |
| Identificador |
PHYSICAL REVIEW C, COLLEGE PK, v. 85, n. 3, pp. 437-448, 2012 0556-2813 http://www.producao.usp.br/handle/BDPI/35089 10.1103/PhysRevC.85.034320 |
| Idioma(s) |
eng |
| Publicador |
AMER PHYSICAL SOC COLLEGE PK |
| Relação |
PHYSICAL REVIEW C |
| Direitos |
openAccess Copyright AMER PHYSICAL SOC |
| Palavras-Chave | #MICROSCOPIC DESCRIPTION #STATES #GAMMASPHERE #SE-70 #PHYSICS, NUCLEAR |
| Tipo |
article original article publishedVersion |
