Decay of 103Ru

Abstract

The decay of 103Ru to 103Rh has been investigated with the help of scintillation spectrometers. Employing gamma-gamma coincidences and sum-coincidence measurements as well as successive “peel off” procedure, the following gamma rays have been resolved: 53 keV (0.7), 65 keV (-), 297 keV (0.6), 362 keV (), 440 keV (0.9), 498 keV (88), 555 keV (2) and 610 keV (5). The following gamma ray cascades were established: 555-53 keV, 440-53 keV and 297-65 keV. Beta-gamma coincidences revealed two inner beta-ray groups of maximum energies 112±6 keV (7) and 214±12 keV (89) emitted in coincidences with the 610 and 498 keV gamma rays, respectively. The figure in parentheses represents relative intensity in arbitrary units. The maximum energy of the highest energy beta ray group has been measured to be 716±40 keV. From gamma-gamma coincidences the internal conversion coefficient of the 53 keV gamma ray has been found to be α K = 2.74±0.03 indicating a mixture of M1+E2 with δ 2 = 0.15±0.02.. A decay scheme is presented.