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Observation of isomeric decays in the $r$-Process waiting-point nucleus $^{130}Cd_{82}$

Abstract : The $\gamma$ decay of excited states in the waiting-point nucleus 130Cd82 has been observed for the first time. An 8+ two-quasiparticle isomer has been populated both in the fragmentation of a 136Xe beam as well as in projectile fission of 238U, making 130Cd the most neutron-rich N=82 isotone for which information about excited states is available. The results, interpreted using state-of-the-art nuclear shell-model calculations, show no evidence of an N=82 shell quenching at Z=48. They allow us to follow nuclear isomerism throughout a full major neutron shell from 98Cd50 to 130Cd82 and reveal, in comparison with 76Ni48 one major proton shell below, an apparently abnormal scaling of nuclear two-body interactions.
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Contributor : Yvette Heyd <>
Submitted on : Monday, December 10, 2007 - 10:12:57 AM
Last modification on : Thursday, November 19, 2020 - 12:58:54 PM

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A. Jungclaus, L. Caceres, M. Gorska, M. Pfützner, S. Piétri, et al.. Observation of isomeric decays in the $r$-Process waiting-point nucleus $^{130}Cd_{82}$. Physical Review Letters, American Physical Society, 2007, 99, pp.132501. ⟨10.1103/PhysRevLett.99.132501⟩. ⟨in2p3-00195148⟩



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