2012/12/31 by Saori Pastore, S. Pastore, Steven C. Pieper +2 · 4 citations
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.87.035503
published as Phys. Rev. C 87, 035503 (2013) [15 pages] · 17 pages, 7 figures; minor changes with some experimental numbers updated and references added
arxiv created 2013/02/28 · openalex publication_date 2013/03/25 · arxiv updated 2013/05/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Quantum Monte Carlo calculations of electromagnetic moments and transitions are reported for A\ensuremath≤9 nuclei. The realistic Argonne v18 two-nucleon and Illinois-7 three-nucleon potentials are used to generate the nuclear wave functions. Contributions of two-body meson-exchange current (MEC) operators are included for magnetic moments and M1 transitions. The MEC operators have been derived in both a standard nuclear physics approach and a chiral effective field theory formulation with pions and nucleons including up to one-loop corrections. The two-body MEC contributions provide significant corrections and lead to very good agreement with experiment. Their effect is particularly pronounced in the A=9, T=3/2 systems, in which they provide up to \ensuremath∼20% (\ensuremath∼40%) of the total predicted value for the 9Li (9C) magnetic moment.