Abstract
The charge-exchange 71Ga( 3He,t γ) 71Ge reaction was used to study the spin-isospin (Gamow Teller: GT) excitations relevant to the axial-vector charged-weak response for solar neutrinos. High-lying GT states in 71Ge with excitation energies up to one MeV above the neutron threshold were found to have finite γ-decay branches to low-lying states. The GT strengths for relevant states and absorption rates of solar neutrinos through the 71Ga( ν, e) 71Ge and 71Ga( ν,e γ) 71Ge reactions were derived.
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