Speaker
Description
The stable iodine and caesium isotopes are the primary constituents of several
detectors including the CsI[Na] neutrino detector operational from 2015 to 2019
at the SNS. Theoretically computed cross sections for these nuclei are therefore
of considerable interest. The goal of the research outlined in this abstract was to
obtain accurate theoretical scattering cross sections for stopped pion neutrino
scattering off these nuclei using both the impulse approximation and with the
two-body current included. The results were compared to recently measured
experimental cross section of the cc-scattering off iodine. The contributions to
the quenching of the weak axial-vector coupling constant from the two-body
currents and other sources were investigated. The nuclear model employed was
the microscopic quasiparticle-phonon model (MQPM). It was found that the
impulse approximation produced good agreement with experiment when the
quenched value of the coupling constant used was obtained from a linear fit
from a comprehensive study of the quenching in beta-decays.
