Low-q2Electron Scattering from the 15.109-MeV State ofC12and the Conserved-Vector-Current Test

Abstract
High-precision electron scattering measurements from the 15.109-MeV 1+ state in C12 are made at θ=75 and 110° with 35E55 MeV. From the measurements B(M1) is extrapolated to the photon point and the radiative width is determined, Γγ=37.0±1.1 eV. The corresponding weak magnetism results for β decay and μ capture are given.