Abstract
An experimental setup on the thermal neutron beam of the IR-8 reactor at the National Research Centre Kurchatov Institute is described. This setup has been designed to precisely measure the ratio of spectra of β particles emitted by mixtures of 235U and 239Pu fission products. The experiment is based on simultaneous measurements of β spectra from fissile isotopes 235U and 239Pu and the background spectrum in the same neutron beam. Measurements of the β spectra are taken by a high-selectivity β spectrometer in the time interval when the neutron beam is intercepted by a mechanical chopper. The evolution of the measurement technique is considered.
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Original Russian Text © K.A. Balygin, M.D. Karetnikov, A.I. Klimov, V.I. Kopeikin, V.A. Kurkin, E.A. Meleshko, Yu.N. Panin, A.A. Sabel’nikov, 2014, published in Pribory i Tekhnika Eksperimenta, 2014, No. 1, pp. 27–32.
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Balygin, K.A., Karetnikov, M.D., Klimov, A.I. et al. An experimental setup for studying spectra of β particles emitted by mixtures of 235U and 239Pu thermal neutron fission products. Instrum Exp Tech 57, 22–27 (2014). https://doi.org/10.1134/S0020441214010126
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DOI: https://doi.org/10.1134/S0020441214010126