A search for low-lying mixed symmetry states in $^{140}$Nd
ORAL
Abstract
Low-lying states in $^{140}$Nd were populated by $\beta^+$ decay from $^{140}$Sm. Subsequent $\gamma$ decays were observed off-beam at the YRAST Ball spectrometer at Yale University, which has recently been reconfigured for angular correlation studies. Angular correlation measurements will be used to search for possible low-lying mixed-symmetric $2^+$ states. Our results will shed more light on the evolution of mixed symmetry states in the N=80 isotones, as they seem to exhibit a strong dependence on the underlying shell structure. Preliminary results of this investigation will be presented. This work is supported by US DOE grant numbers DE-FG02-91ER-40609, DE-FG02-88ER-40417, DE-FG02-05ER-41379, and the US National Science Foundation.
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Authors
Elizabeth Williams
Yale University
WNSL, Yale University, New Haven, CT 06520
R.J. Casperson
WNSL, Yale University, New Haven, CT 06520
V. Werner
WNSL, Yale University, New Haven, CT 06520
H. Ai
WNSL, Yale University, New Haven, CT 06520
P. Boutachkov
Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903
R.F. Casten
WNSL, Yale University, New Haven, CT 06520
M. Chamberlain
WNSL, Yale University, New Haven, CT 06520; Department of Physics, University of Surrey, Guildford, Surrey, UK
G. G\"{u}rdal
WNSL, Yale University, New Haven, CT 06520; Department of Chemistry, Clark University, Worcester, MA 01610
