SELF-CONSISTENT APPROACH TO NEUTRINO CAPTURE BY HEAVY NUCLEI

Oct 17, 2020, 10:55 AM
25m
Online

Online

Oral report Section 5. Neutrino physics and astrophysics. Section 5. Neutrino physics and astrophysics

Speaker

Grigory Koroteev (MIPT)

Description

I. N. Borzov1,2, Yu. S. Lutostansky1, G. A. Koroteev3, V. . Tikhonov1, S. V. Tolokonnikov1,3, A. N. Fazliakhmetov1,4 1 National Research Centre “Kurchatov Institute”, Moscow, Russia 2Bogolubov Laboratory of Theoretical Physics, Joint Institute of Nuclear Research, Dubna, Russia 3 Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia 4 Institute for Nuclear Research, Russian Academy of Sciences, Moscow, Russia †E-mail: Borzov_IN@nrcki.ru, cc: ibor48@mail.ru

A self-consistent approach to the cross-sections of neutrino capture by heavy nuclei due to charged currents is presented. Non-magic nuclei with pairing in the neutron and proton sectors are considered in the framework of the energy density functional (EDF) theory. Various versions of the EDFs proposed by Fayans et al. are used (DF3 [1], DF3-a [2]). In order, to calculate the strength functions of the Fermi, Gamow-Teller and spin-dipole excitations we use the quasiparticle random-phase approximation with the particle-hole continuum taken into account [1, 2, 3]. Particular attention is paid to the neutrino capture by 72,74Ge nuclei. This is the background process in the measurements of double beta decay. The work is supported by the Russian Foundation for Basic Research (Grant no.18-02-00670_а) and the grant by the Department of Neutrino Studies of the NRC KI.

  1. I. N. Borzov, S. A. Fayans, E. L. Trykov, Nuclear Physics A 584, 335 (1996).
  2. I. N. Borzov, S. Goriely, Physical Review C 62, 035501 (2000).
  3. I. N. Borzov, K-H. Langanke, G. Martinez-Pin’edo, N. T. Zinner // International Symposium on Nuclear Astrophysics – Nuclei in Cosmos. CERN, Geneva, Switzerland, POS(NIC-IX) 078, 2016.

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