| Abstract: | Hg199m was produced from natural HgO by fastn irradiation. The cascade decay was investigated with scintillation spectrometers by application of the summing technique. The following results were obtained: half-lifeT 1/2=(43±0,5) min; energy of the isomeric transitionE γ1=(375±3)keV; conversion coefficients α K375=3,05±0,25; αtotal=5,45±0,25; yielding the multipole order of the isomeric transition to beM4+(25±15)%E5; energy of the second transitionE γ2=(159±2)keV; conversion coefficients α K159=0,30±0,03; αtotal=0,9±0,1, confirming the multipolarityE2 of this transition. |
