Measurement of Gamow-Teller strength for I-127 as a solar neutrino detector

Gamow-Teller transition strengths obtained in the I-127(p,n)Xe-127 reaction studied at 94, 159, and 197 MeV incident proton energies are presented, an d used to evaluate the efficiency of I-127 as a solar neutrino detector. Ex citation of the J(pi) = (3/2)(+) first excited state at E-x = 0.125 MeV in Xe-127, sensitive to Be-7 solar neutrinos, is evaluated. The sum of Gamow-T eller strength up to particle emission threshold and up to 20 MeV excitatio n energy are also reported. This paper also provides a new measurement of t he Coulomb displacement energy Delta E-c, the excitation energy of the isob aric analog state, and the centroid of the Gamow-Teller resonance in Xe-127 . [S0556-2813(99)02101-9].