Abstract
The cross section for neutrino-induced nuclear reactions is presented in the form of a multipole expansion, appropriate for the excitation of nuclear levels of a definite spin and parity. The theory is then applied to the levels of , knowledge of their excitation cross sections being required for both low-energy MeV, with neutrinos from stopped muons) and high-energy () neutrino experiments that use counters containing carbon. We take a phenomenological approach, determining the needed transition densities from fits to the measured form factors of these levels for the closely related electroexcitation process. While the low-energy cross section is dominated by the excitation of the ground state of , the high-energy cross sections receive their largest contributions from both positive-parity spin-flip states and especially from the giant-resonance levels, with additional strength from and , levels.
- Received 22 May 1972
DOI:https://doi.org/10.1103/PhysRevC.6.1911
©1972 American Physical Society