GFMC calculations of electromagnetic moments and M1 transitions in $A\le 9$ nuclei

Abstract

We present recent Green's function Monte Carlo calculations of magnetic moments and M1 transitions in $A\le 9$ nuclei, which include corrections arising from two-body meson-exchange electromagnetic currents. Two-body effects provide significant corrections to the calculated observables, bringing them in excellent agreement with the experimental data. In particular, we find that two-body corrections are especially large in the A=9, $T=3/2$ systems, in which they account for up to $\sim 20$ ($\sim 40$) of the total predicted value for the ${}^9$Li (${}^9$C) magnetic moment.

6 pages, 5 figures, proceedings of the 7th International Workshop on Chiral Dynamics, August 6-10 2012, Jefferson Lab, Newport News, Virginia, USA