Magnetic moment of the short-lived β-emitter 23Mg

The magnetic moment of 23 Mg (I π = 3 2 + , T 1 2 =11.3 s ) has been determined to be |μ( 23 Mg )| = 0.5364±0.0003 μ N by means of a β-NMR detection with recoil polarization obtained through a nuclear reaction. The deduced spin expectation values are in agreement with the systematic behavior of the mirror doublets in the sd shell.