Collectivity at N=50: 82Ge and 84Se

Abstract

The neutron-rich N=50 isotones 82Ge and 84Se were investigated using intermediate-energy Coulomb excitation on a 197Au target and inelastic scattering on 9Be. As typical for intermediate-energy Coulomb excitation with projectile energies exceeding 70 MeV/nucleon, only the first 2^+ states were excited in 82Ge and 84Se. However, in the inelastic scattering on a 9Be target, a strong population of the first 4^+ state was observed for 84Se, while there is no indication of a similarly strong excitation of the corresponding state in the neighboring even-even isotone 82Ge. The results are discussed in the framework of systematics and shell-model calculations using three different effective interactions.

Accepted for publication in Phys. Rev. C

References in corpus (5)

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• Comparison of shell model results for even-even Se isotopes
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• Improving the predictive power of empirical shell-model Hamiltonians
• Lifetimes of low-lying excited states in ${}_{36}^{86}$Kr${}_{50}$
• Structure of odd ${}^{79,81,83}$Se isotopes with proton and neutron excitations across $Z=28$ AND $N=40$
• Electromagnetic Properties of the N=50 Isotones with the p35-i3 Hamiltonian