Coulomb excitation of transitional selenium at ReA3
ORAL
Abstract
72Se lies in a transitional region of the nuclear landscape, between well-established prolate nuclei around 74,76Se, and 70Se which has been found to exhibit oblate deformation. Calculations for 72Se predict a coexistence between prolate and oblate deformations, representing a transitional point in the selenium isotopic chain. The determination of the sign of deformation in 72Se is thus of considerable interest in order to experimentally localize this shape transition within the selenium isotopes.
The results of a Coulomb-excitation measurement performed on 72Se will be presented: the first radioactive-beam Coulomb-excitation measurement performed with the JANUS setup at the ReA3 facility at NSCL. These results demonstrate a prolate deformation in 72Se, indicating a transition from prolate to oblate deformation occurs between 72Se and 70Se. Results from a 76Se stable-beam experiment using the same setup will also be presented.
The results of a Coulomb-excitation measurement performed on 72Se will be presented: the first radioactive-beam Coulomb-excitation measurement performed with the JANUS setup at the ReA3 facility at NSCL. These results demonstrate a prolate deformation in 72Se, indicating a transition from prolate to oblate deformation occurs between 72Se and 70Se. Results from a 76Se stable-beam experiment using the same setup will also be presented.
*Work at LLNL performed under contract DE-AC52-07NA27344. Work supported in part by the National Science Foundation under Contract No. PHY-1565546 (NSCL), by the US DOE, Office of Nuclear Physics, under Grant No. DE-FG02-08ER41556 (NSCL) and by the DOE National Nuclear Security Administration through the NSSC, under Award No. DE-NA0003180.
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Presenters
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Jack Henderson
- Lawrence Livermore Natl Lab