The gyromagnetic ratio of the 589 keV 3/2− state of117In

Theg-factor of the 589 keV state of¹¹⁷In has been determined by a measurement of the rotation of the 1,303–273 keVγ —γ directional correlation in an external magnetic field of 9.55(1) T. The result,g _3/2(589 keV)=+0.068(39), contradicts the usual interpretation of the state as the 2p _3/2 single proton hole configuration for which the Schmidt value isg _3/2-(Schmidt)=+2.53. It favours the interpretation as the first rotational state built up on the single proton 301] 1/2^? Nilsson orbit in a strongly deformed core of prolate shape.