Abstract
Enriched Ru 101 bombarded with 6 MeV protons was observed to emit 75, 310, and 545 keV gamma rays each decaying with a 4.4 d half-life. However, the lead and copper absorption measurements strongly indicated that the 75 keV photo peak, observed in well crystal measurements, was actually due to the Pb K X-ray, produced by the photo-electric absorption of the 310 keV gamma ray in the lead shield around the crystal. A weak 235 keV gamma ray was observed to be in coincidence with the 310 keV gamma ray previously assigned to Rh 101. The latter was not in coincidence with 545 keV. After the decay of 4.4 d activity, gamma rays of 127 and 198 keV were observed to be in coincidence and have a very long half-life. The 127 keV gamma ray was associated with Rh 101 from the reported Coulomb excitation of Ru 101 and the decay of Tc 101. The proposed decay scheme, having levels at 127, 310, 325 and 545 keV, is presented in this paper.
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