First observation of γ rays emitted from excited states south-east of Sn132: The πg−19/2⊗νf7/2 multiplet of In83132

Abstract : For the first time, the γ decay of excited states has been observed in a nucleus situated in the quadrant south-east of doubly magic Sn132, a region in which experimental information so far is limited to ground-state properties. Six γ rays with energies of 50, 86, 103, 227, 357, and 602 keV were observed following the β-delayed neutron emission from Cd85133, populated in the projectile fission of a U238 beam at the Radioactive Isotope Beam Factory at RIKEN within the EURICA project. The new experimental information is compared to the results of a modern realistic shell-model calculation, the first one in this region very far from stability, focusing in particular on the π0g−19/2⊗ν1f7/2 particle-hole multiplet in In83132. In addition, theoretical estimates based on a scaling of the two-body matrix elements for the πh−111/2⊗νg9/2 analog multiplet in Tl127208, one major proton and one major neutron shell above, are presented.
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Submitted on : Wednesday, April 13, 2016 - 9:23:03 AM
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A. Jungclaus, A. Gargano, H. Grawe, J. Taprogge, S. Nishimura, et al.. First observation of γ rays emitted from excited states south-east of Sn132: The πg−19/2⊗νf7/2 multiplet of In83132. Physical Review C, American Physical Society, 2016, 93 (4), pp.041301(R). ⟨10.1103/PhysRevC.93.041301⟩. ⟨in2p3-01301824⟩

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