Author:
Bottoni S.,Gamba E. R.,De Gregorio G.,Gargano A.,Leoni S.,Fornal B.,Brancadori N.,Ciconali G.,Crespi F. C. L.,Cieplicka-Oryńczak N.,Iskra Ł. W.,Colombi G.,Kim Y.H.,Köster U.,Michelagnoli C.,Dunkel F.,Esmaylzadeh A.,Gerhard L.,Jolie J.,Knafla L.,Ley M.,Régis J.-M.,Schomaker K.,Sferrazza M.
Abstract
Abstract
The neutron-rich 131Sb nucleus was studied at Institut Laue-Langevin, with the LOHENGRIN spectrometer, via neutron-induced fission of 235U and lifetime measurements using LaBr3(Ce) detectors. The lifetimes of the
11
/
2
1
+
and
19
/
2
1
+
states were measured with the generalized centroid difference and the decay slope methods, yielding T½=3(2) ps and T½=1347(171) ps, respectively. The measured value for the
11
/
2
1
+
is at the limit of the fast-timing technique. The level scheme of 131Sb and the decay properties of the
11
/
2
1
+
state were described by realistic shell-model calculations, which reproduce well both the experimental spin and energy sequences of 131Sb and the measured B(E2;
11
/
2
1
+
→
7
/
2
1
+
) value, pointing to an almost pure 2+(130Sn) ⊗ πg7/2, core-proton coupled configuration for the
11
/
2
1
+
state.
Subject
Computer Science Applications,History,Education