Speaker
Description
Mn/Mp, the ratio of neutron to proton quadrupole transition matrix elements has been successfully measured in recent experiments. We perform for the first time a systematic theoretical study of Mn/Mp with the ab initio no-core shell model (NCSM) for five carbon isotopes and 10Be. We find a good agreement with the available experimental data.
Using the ab initio NCSM, we also calculate Qn, the neutron quadrupole moment, and MnQp/MpQn, the ratio of Mn/Mp over the ratio of neutron to proton quadrupole moments Qn/Qp, showing good convergence. Qn can be extracted from the combination of our well-converged MnQp/MpQn results and experimental data for Mn/Mp and Qp. Although Qn itself is not directly accessible experimentally, its studies are interesting and significant since it plays a crucial role in the neutron-proton asymmetry in quadrupole deformation.
