Abstract
The continuous gamma-ray spectra (inner bremsstrahlung) accompanying orbital electron capture in , , and have been studied with the use of a scintillation spectrometer of NaI(Tl). The shape of the spectrum of has been found to correspond to a second forbidden spectrum (, No) and is distinctly different from that of an allowed one. The parameter, , of the correction factor, , is approximately 0.33; the value of , for a pure tensor interaction, is (-6). The probability of emission of a photon of energy greater than 100 kev has been shown to be 1.4±0.4 times the theoretical value.
The spectrum of has an allowed shape at energies as low as ∼35 kev, and the ratio of emission probabilities is 1.05±0.25 for the region of energy lying above 35 kev. The spectrum of has been compared with the calculations of Glauber and Martin. In this case, the value of is 1.1±0.3 at higher energies.
- Received 10 November 1955
DOI:https://doi.org/10.1103/PhysRev.102.466
©1956 American Physical Society