High-precision g-factor measurement in ²²Ne using the TDRIV method

The g factor of a nuclear state is a sensitive probe to the single-particle contributions to the nuclear wave function and can provide a stringent test of modern theoretical models. In the case of the stable ²²Ne isotope, the g factor of its 2⁺ state was first measured in 1977 using the Time-Differential Recoil In Vacuum (TDRIV) method. The experimental value was in agreement with some of the theoretical calculations at the time, however, modern shell-model calculations predict a value larger by more than 3 standard deviations. In order to resolve this discrepancy between experiment and theory we have performed a new TDRIV measurement of the g factor of the 2⁺ state in ²²Ne at GANIL, France. The experimental setup consisted of the EXOGAM gamma-ray spectrometer, the Orsay Universal Plunger System (OUPS) and the newly-developed Orsay Particle Scintillator Array (OPSA). The preliminary results from this experiment will be presented.