Orbital and Spin Magnetic Dipole Strength in a shell model calculation with = excitations: $^8\mbox{Be}$
arXiv:nucl-th/9406006 · doi:10.1016/0370-2693(94)90795-1
Abstract
The magnetic dipole strength and energy-weighted strength distribution is calculated in $^8\mbox{Be}$, as well as the separate orbit and spin parts. All = excitations over and above (and including) the configuration are included. The interaction has a central, two-body spin-orbit and a tensor part. The energy- independent and energy-weighted {\underline orbital} strength distribution is remarkably insensitive to the presence or absence of the spin-orbit or tensor interaction -not so the spin strength. The energy-weighted strength distribution can be divided into a low enegy and a high energy part. The high energy orbital part is somewhat less but close to the low energy part, in fair agreement with a prediction that they be equal by de Guerra and Zamick and by Nojarov. There is a wide plateau separating the low energy part from the high energy part.
12 pages (4 figs/on request) \#RU9445