Shape coexistence at the proton drip-line: First identification of excited states in 180Pb

Details Shape coexistence at the proton drip-line: First identification of excited states in 180Pb Shape coexistence at the proton drip-line: First identification of excited states in 180Pb

2010-03-01

arxiv.org/abs/1003.0452v1

Physics

Nuclear Physics

Nuclear Experiment

5 pages, 4 figures, submitted to Phys.Rev.C

Scientific paper

Excited states in the extremely neutron-deficient nucleus, 180Pb, have been identified for the first time using the JUROGAM II array in conjunction with the RITU recoil separator at the Accelerator Laboratory of the University of Jyvaskyla. This study lies at the limit of what is presently achievable with in-beam spectroscopy, with an estimated cross-section of only 10 nb for the 92Mo(90Zr,2n)180Pb reaction. A continuation of the trend observed in 182Pb and 184Pb is seen, where the prolate minimum continues to rise beyond the N=104 mid-shell with respect to the spherical ground state. Beyond mean-field calculations are in reasonable correspondence with the trends deduced from experiment.

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