New neutrino-nucleus reaction cross sections at solar, reactor and supernova neutrino energies

Toshio Suzuki,Toshitaka Kajino,Satoshi Chiba,Michio Honma,A B Balantekin,S Lunardi,C Signorini,M Chiari,P.G Bizzeti,A Nannini,A Dainese,J.J Valiente-Dobon,C Bucci,R Menegazzo,P Di Nezza

doi:10.1051/epjconf/20146607025

Abstract

Remarkable improvements in the evaluation of neutrino-nucleus reaction cross sections are obtained based on new shell-model Hamiltonians with proper tensor compo- nents. New �-induced reaction cross sections on 12 C, 13 C, 56 Fe, 56 Ni and 40 Ar are pre- sented, and predictions for nucleosynthesis in supernova explosions, �-oscillation effects and low-energy reactor and solar neutrino detection are discussed based on these new cross sections.

Highlights

Considerable improvements in the evaluations of neutrino-nucleus reaction cross sections have been achieved based on new shell-model Hamiltonians at solar, reactor and supernova neutrino energies
A common feature of the new intearctions is that they have proper tensor components
New neutrino-nucleus cross sections are obtained based on new shell-model Hamiltonians with proper tensor interactions

Summary

Introduction

Considerable improvements in the evaluations of neutrino-nucleus reaction cross sections have been achieved based on new shell-model Hamiltonians at solar, reactor and supernova neutrino energies. A new shell-model Hamiltonian for p f -shell nuclei, GXPF1J[6], is shown to reproduce ν-56Fe cross section for DAR neutrinos[7]. It describes well the Gamow-Teller (GT) strengths in Ni isotopes, in particular 56Ni[8, 9]. Neutral-current reactions on 56Ni are evaluated, and the enhancement of proton-emission cross sections and production of 55Mn element in supernova explosions are discussed[8] The abundances of 11B and 7Li evaluated by using a GCE (galactic chemical evolution) model are found to be enhanced by 13∼14% compared with those by HW92[16]

Effects of ν-oscillation and ν-mass hierarchy

Summary