Interaction of Solar Neutrinos with {}^{98}mathrm{Mo} and {}^{100}mathrm{Mo} Nuclei

Abstract

The process of neutrino interaction with {}^{98}mathrm{Mo} and {}^{100}mathrm{Mo} nuclei is studied with allowance for the effect of charge-exchange resonances. The results obtained by calculating the cross section for solar-neutrino capture by the isotopes {}^{98}Mo and {}^{100}Mo, sigma(E_{nu}), are presented. Use is made of both experimental data obtained for the strength functions S(E) in (p,n) and ({}^{3}He, t) charge-exchange reactions and the strength functions S(E) calculated within the theory of finite Fermi systems. The effect of the resonance structure of S(E) on the calculated cross sections for solar-neutrino capture is studied, and the contribution of each high-lying resonance to the capture cross section sigma(E_{nu}) is isolated. The contributions of all components of the solar neutrino spectrum are calculated. The contribution of background solar neutrinos to the double-beta decay of {}^{100}Mo nuclei is estimated.