2017/09/12 by J. Henderson, G. Hackman, P. Ruotsalainen +24 · 1 citation
Physics and Astronomy · #nucl-ex
paper · pdf · doi:10.1016/j.physletb.2018.05.064
7 pages, 5 figures. To be submitted to Physics Letters B
arxiv created 2017/09/12 · arxiv updated 2018/07/04
Many-body nuclear theory utilizing microscopic or chiral potentials has developed to the point that collectivity might be dealt with in an \it ab initio framework without the use of effective charges; for example with the proper evolution of operators, or alternatively, through the use of an appropriate and manageable subset of particle-hole excitations. We present a precise determination of E2 strength in 22Mg and its mirror 22Ne by Coulomb excitation, allowing for rigorous comparisons with theory. No-core symplectic shell-model calculations were performed and agree with the new B(E2) values while in-medium similarity-renormalization-group calculations consistently underpredict the absolute strength, with the missing strength found to have both isoscalar and isovector components.