Beta-decay half-lives and level ordering of 102m,gRh

Beta-decay half-lives of the ground state and an isomer of 102Rh have been determined 207.3(17) d and 3.742(10) y, respectively, by γ-ray decay curves following each β-decay. It has been found that a state (2−) which has a shorter half-life (207.3 d) is the ground state from the result that the half-life of the 41.9 keV isomeric γ-transition was equal to 3.742 y. It has also been confirmed that the 41.9 keV transition is certainly an isomeric transition with X–γ coincidence measurement.