Study of 19 MeV Region of exp 12 C by 180 exp 0 Electron Scattering

摘要

Back-angle, 180 exp 0 electron scattering was used to measure the transverse form factors squared of transitions to the 19 MeV excitation region of exp 12 C. Data were obtained in a momentum transfer range from 0.5 to 2.5 fm exp -1 . The high resolution of the data enabled a decomposition of this complex into five distinct peaks. Analysis of the data includes a comparison with form factors predicted in a shell model calculation. In addition, an interpretation using isospin mixing of 4 exp - states, as suggested by recent pion scattering work, is discussed. The two interpretations are not entirely compatible. (ERA citation 05:017048)