Author
Börje Persson
Bio: Börje Persson is an academic researcher from Lund University. The author has contributed to research in topics: Bremsstrahlung & Beta particle. The author has an hindex of 5, co-authored 6 publications receiving 107 citations.
Papers
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TL;DR: In this paper, the authors measured the internal bremsstrahlung from the beta decays of P 32, Sr 89, Y 90, Y 90, Y 91 and Bi 210 in a coincidence experiment.
34 citations
TL;DR: In this article, the yields for 28 different 127I(γ, yp xn) reactions have been measured by activation analysis from their thresholds up to 1 GeV, and mean cross sections in the energy region 250-900 MeV have been determined.
22 citations
TL;DR: In this article, the beta spectra of Pr 143 and P 32 have been measured using solid state detectors in approximately 4 π geometry, where deviations from the statistical shape are small, if any.
18 citations
TL;DR: In this paper, the spectrum of internal bremsstrahlung from P32 has been measured in a coincidence experiment and the experimental results are compared with the theory of Knipp and Uhlenbeck and by Bloch.
17 citations
TL;DR: In this paper, a coincidence experiment at two fixed angles with respect to the direction of emission of the electron was conducted to measure the internal bremsstrahlung spectra.
14 citations
Cited by
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TL;DR: In this paper, a compilation of experimentally determined properties of energy levels of Z = 11−21 nuclei with special emphasis on nuclear spectroscopy is presented. But this compilation is limited to the case of nuclear spectrograms.
607 citations
325 citations
TL;DR: In this article, a database of measured shape factors was created, containing 130 distinct transitions and some analysis parameters were defined to characterize the quality of the calculated spectra, and results from this systematic comparison between theory and experiment are presented in detail.
Abstract: To test the relevance of the most common assumptions in the calculation of beta $(\ensuremath{\beta})$ and neutrino $(\ensuremath{
u})$ spectra, a database of measured shape factors was created, containing 130 distinct transitions. Some analysis parameters were defined to characterize the quality of the calculated spectra. Results from this systematic comparison between theory and experiment are presented in detail. The ${\ensuremath{\lambda}}_{k}=1$ approximation for forbidden unique transitions is shown to be systematically worse than the correct calculation of the theoretical shape factors, where the energy dependence of the ${\ensuremath{\lambda}}_{k}$ parameters is included. Regarding forbidden nonunique transitions, the $\ensuremath{\xi}$ approximation is found to be valid for only about half of the first forbidden nonunique transitions and incorrect in all other cases. The criterion $2\ensuremath{\xi}/{E}_{0}\ensuremath{\gg}1$ is proved to be insufficient in itself if $2\ensuremath{\xi}/{E}_{0}l100$.
90 citations
TL;DR: In this paper, detailed and systematic Monte Carlo calculations have been performed for different characteristics of inelastic photonuclear reactions for an energy range of Tγ ≈ 50 MeV-1 GeV in the framework of the intranuclear cascade model taking into account the competition between particle evaporation and fission of excited residual nuclei.
54 citations
TL;DR: The contribution of detour transitions to the internal bremsstrahlung accom- panying nuclear beta decay is calculated in this paper, where it is shown that such contributions will in general be impor- tant for forbidden beta decays.
46 citations