Nuclear recoil correction to the g factor of boron-like argon
  The nuclear recoil effect to the g factor of boron-like ions is investigated. The one-photon-exchange correction to the nuclear recoil effect is calculated in the non-relativistic approximation for the nuclear recoil operator and in the Breit approximation for the interelectronic-interaction operator. The screening potential is employed to estimate the higher-order contributions. The updated g-factor values are presented for the ground 2P_1/2 and first excited 2P_3/2 states of B-like argon 40^Ar^13+, which are presently being measured by the ARTEMIS group at GSI. 
Arseniy A. Shchepetnov, Dmitry A. Glazov, Andrey V. Volotka, Vladimir   M. Shabaev, Ilya I. Tupitsyn, Guenter Plunien
physics.atom-ph