Detection on NMR via the anisotropy of X-rays (X-NMR-ON)

Nuclear magnetic resonance on oriented nuclei has been detected for the first time via the destruction of the anisotropy of characteristic L_x-rays. The new method can be applied to isomeric states which decay only via highly converted transitions, for which the standard NMR-ON technique - detection of NMR via the anisotropy of γ-rays - is not applicable. The X-NMR-ON technique has been used to measure the magnetic hyperfine splitting of^193mpt (I^π=1322⁺; E=149.8 keV; T_1/2= 4.3 d) to be | g μ_NB_HF/h|=111.3 (3) MHz. with the known hyperfine field of -1280(27) kG the magnetic moment of^193mpt is deduced to be |μ|=0.7417(14) μ_N. This magnetic moment differs strongly from the known magnetic moments of the 13/2⁺ isomeric states in Hg and Pb and^195mPt.