Institute of Natural Sciences and Mathematics, University of Rijeka, Olge Ban 22, Rijeka, Yugoslavia;Institute Rudjer Bo?kovi?, Zagreb, Yugoslavia;Department of Physics, University of Ottawa, Ottawa, Ontario, Canada
Abstract:
Internal bremsstrahlung (IB) emitted in the non-unique first-forbidden electron capture decay of the ground state of 145Sm to the first excited level of 145Pm has been studied. The total IB spectrum and the IB spectrum for captures proceeding via the 1s shell were measured for photons in the energy range of 100–580 keV and the spectra were normalized to the non-radiative capture rate. The experimental data agree with theoretical predictions.