Speaker
Description
Charge-exchanging processes such as beta decay, neutrinoless double-beta decay, and Gamow-Teller giant resonances are observed in a wide region of the nuclear chart and play important roles in nuclear physics and related fields. Theoretical descriptions based on nuclear density functional theory (DFT) enable us to calculate all the nuclei in the chart. A standard approach for describing charge-exchanging processes within nuclear DFT is the proton-neutron quasiparticle random-phase approximation (pnQRPA). QRPA is computationally demanding, as it involves the diagonalization of a large-dimensional matrix in its original formulation, but an efficient solution called the finite amplitude method (FAM) was developed recently [1]. The proton-neutron FAM (pnFAM) [2] has been successfully applied to beta decay, Gamow-Teller resonances, and two-neutrino emitting double-beta decay using Skyrme-type energy density functionals [3, 4].
In this presentation, we will present the current status of implementing the Gogny-type energy density functional, which has less uncertainty in the proton-neutron pairing channel than the Skyrme-type one, into the pnFAM code to calculate the transition strength for charge-exchanging processes.
[1] T. Nakatsukasa, T. Inakura, and K. Yabana, Phys. Rev. C 76, 024318 (2007).
[2] M. Mustonen, T. Shafer, Z. Zenginerler, and J. Engel, Phys. Rev. C 90, 024308 (2014).
[3] M. Mustonen and J. Engel, Phys. Rev. C 93, 014304 (2016).
[4] N. Hinohara and J. Engel, Phys. Rev. C 105, 044314 (2022).
| Research field of your presentation | Theoretical Low-energy nuclear physics |
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