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Title: Coulomb excitation of Sn-110 using REX-ISOLDE
Authors: Ekstrom, A ×
Cederkall, J
Hurst, A
Fahlander, C
Banu, A
Butler, P
Eberth, J
Gorska, M
Habs, D
Huyse, Marc
Kester, O
Niedermayer, O
Nilsson, T
Pantea, M
Scheit, H
Schwalm, D
Sletten, G
Ushasi, D. P
Van Duppen, Piet
Warr, N
Weisshaar, D #
Issue Date: Jul-2006
Publisher: Royal swedish acad sciences
Series Title: Physica Scripta vol:T125 pages:190-191
Abstract: In this paper, we report the preliminary result from the first Coulomb excitation experiment at REX-ISOLDE (Habs et al 1998 Nucl. Instrum. Methods B 139 128) using neutron-deficient Sn-beams. The motivation of the experiment is to deduce the reduced transition probability, B(E2; 2(+) -> 0(+)), for the sequence of neutron deficient, unstable, even-even Sn- isotopes from Sn-110 to ultimately Sn-110. Safe Coulomb excitation using a radioactive beam opens up a new path to study the lifetime of the first excited 2(+) state in these isotopes. The de-excitation path following fusion-evaporation reactions will for the even-even Sn isotopes pass via an isomeric 6(+) state, located at higher energy, which thus hampers measurements of the lifetime of the first excited state using, e. g., recoil-distance methods. For this reason the reduced transition probability of the first excited 2(+) state has remained unknown in this chain of isotopes although the B(E2) value of the stable isotope Sn-112 was measured approximately 30 years ago (see, e. g., Stelson et al 1970 Phys. Rev. C 2 2015). Our experiment is thus the first to accomplish a measurement of this quantity in Sn-110. It is believed that the determination of the B(E2) value in Sn-110 will indicate the turnover point from a trend of increasing B(E2) values for the heavier isotopes to a trend characterized by less collectivity. Our first preliminary result indicates that this assumption may well be correct.
URI: 
ISSN: 0031-8949
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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