Internal Bremsstrahlung and Ionization Accompanying Beta Decay
TL;DR: In this article, the theoretical internal bremsstrahlung spectrum of RaE was calculated by using both the observed forbidden beta spectrum and an allowed beta distribution, and the agreement between the theoretical and experimental results was considered satisfactory.
Abstract: Internal bremsstrahlung spectra from S35 and Pm147 have been investigated with the NaI scintillation spectrometer. Both the absolute cross section of production and the energy distribution agree with theoretical predictions. The theoretical internal bremsstrahlung spectrum of RaE was calculated by using both the observed forbidden beta spectrum and an allowed beta distribution. No significant differences in shape were found in these two cases except in the absolute cross section of production.
The ionization accompanying beta decay was studied in the case of RaE and also in Pm147 by measuring the characteristic x-rays in an NaI scintillation counter as well as in a proportional counter spectrometer. Both K and L radiations were observed, and their absolute cross sections were compared with the theoretical calculations of Migdal, Feinberg, and Levinger. Because of the approximate nature of the theoretical calculations, the agreement between the theoretical and experimental results is considered satisfactory.
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TL;DR: Theoretical approaches to the chief mechanisms of internal ionization during nuclear beta decay are outlined in this article, with particular attention to 1s orbital-electron ejection, and predictions of electron spectra and total ionization probabilities are derived.
9 citations
TL;DR: In this article, the authors measured the internal bremsstrahlung from P32 by a coincidence arrangement, where the electrons are detected in a lens spectrometer and the photons in a NaI(TI) scintillation crystal.
9 citations
TL;DR: In this paper, the spectrum of the superallowed beta emitter was measured using a NaI scintillation spectrometer and the shape of the experimental spectrum agreed with the theory of Knipp, Uhlenbeck and Bloch for energies greater than 0.3 MeV.
9 citations
TL;DR: In this paper, the internal bremsstrahlung spectrum from the allowed decay of 35S was measured by means of a Ge(Li) detector and a specially constructed transport magnet was applied to get rid of the beta-electrons which produce external bremslung.
8 citations
TL;DR: A study of Coulomb field effects in internal bremsstrahlung (IB) has been undertaken by measuring the IB spectra for the allowed beta emitters 32P, 35S and 45Ca in the photon energy intervals of 50-1600 keV, 25-150 keV and 30-240 keV respectively as discussed by the authors.
Abstract: A study of Coulomb field effects in internal bremsstrahlung (IB) has been undertaken by measuring the IB spectra for the allowed beta emitters 32P, 35S and 45Ca in the photon energy intervals of 50-1600 keV, 25-150 keV and 30-240 keV respectively. The experimental results show increasing positive departures from the KUB and Coulomb corrected theories of Lewis and Ford (1957), and Nilsson (1956), with decreasing beta end-point energy. In the case of 35S the experimental results are 40% higher than the more exact theory of Struzynksi and Pollock (see Nucl. Phys., vol.79, p.113 of 1966) for this isotope.
7 citations