CROSS-SECTION CALCULATIONS FOR UPSILON-E + D-]N + P + UPSILON-E

The cross section of the reaction ν̄e+d→n+p+ν̄e has been calculated for an equilibrium fission spectrum as a function of the proton energy chosen to serve as a variable detection threshold. The results are intended to permit as accurate a determination of the neutral-current isovector axial-vector coupling constant as the experimental conditions permit. With the theoretically plausible constant GA=-1.49×10-11 MeV-2 and a most recent semiempirical equilibrium fission spectrum the total cross section is calculated to be 7.27 × 10-45 cm2; half of this cross section leads to proton energies of 150 keV and above. © 1979 The American Physical Society.