Low-Energy Nuclear Excitations along the α-Decay Chains of Superheavy Lv292 and Og294

J. Luis Egido and Andrea Jungclaus
Phys. Rev. Lett. 126, 192501 – Published 10 May 2021

Abstract

We present the first triaxial beyond-mean-field study of the excitation spectra of even-even superheavy nuclei. As representative examples, we have chosen the members of the α-decay chains of Lv292 and Og294, the heaviest even-even nuclei which have been synthesized so far using Ca48-induced fusion-evaporation reactions. In our calculations, the effective finite-range density-dependent Gogny force is used and the angular-momentum and particle-number symmetries are restored. Configuration-mixing calculations are performed to determine ground- and excited-state deformations and to establish the collective band structures of these nuclei. Rapidly varying characteristics are predicted for the members of both decay chains, which are further accentuated when compared to the predictions of simple collective models. Based on the present calculations, the prospect of observing α-decay fine structures in future experiments is discussed.

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  • Received 8 February 2021
  • Revised 5 April 2021
  • Accepted 15 April 2021

DOI:https://doi.org/10.1103/PhysRevLett.126.192501

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

J. Luis Egido1,* and Andrea Jungclaus2,†

  • 1Departamento de Física Teórica and CIAFF, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
  • 2Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain

  • *j.luis.egido@uam.es
  • andrea.jungclaus@csic.es

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Issue

Vol. 126, Iss. 19 — 14 May 2021

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