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The accelerator-based epithermal neutrons source, proposed and created in the Budker Institute of Nuclear Physics, provides the generation and formation of a neutron flux suitable for testing the boron neutron capture therapy of malignant tumors. The paper presents and discusses the results of studies using activation techniques. Using activation foils from the SWX-1552 kit (Shieldwerx, USA), an iterative grid method for reconstructing the neutron spectrum was tested. It was found that the use of activation foils for determining the spectrum of epithermal neutrons is questionable, since the main part of the interaction falls on the high-energy part of the spectrum, instead of the resonance of the foil. The number of neutrons is equal to the number of activated beryllium-7 nuclei (it has been proven by measurements that beryllium-7 is not sputtered from the lithium layer). The neutron yield was monitored by registering gamma quanta from the 7Li(p, n)7Be reaction. Depending on the number of registered gamma quanta, recalculation was made for the amount of activated beryllium. In this paper it was measured the number of neutrons depending on different geometries, different parameters of the proton beam and target material, there is a good agreement with the theory., Proceedings of the 27th Russian Particle Accelerator Conference, RuPAC2021, Alushta, Russia

There is the accelerator-tandem at the Nuclear physics institute in Novosibirsk which is suitable for malignancies treatment such as glioblastoma and melanoma using BNCT methods. There are different gamma spectrometry diagnostics which apply under this project. One of these is used to determine the parameters of the neutron beam. The method is to irradiate a set of activation foils with neutrons. Then measure the gamma-spectrum of foils using gamma detector. Based on these data it can be calculated the activity of foil, as well as the amount and the energy of neutrons. For data processing of these diagnostics there was developed a software which is used for convenient display of gamma-spectrometer data and the activity of the foil. Software allows setting a canal calibration and the sensitivity calibration which is needed to calculate the foil activity., Proceedings of the 25th Russian Particle Accelerator Conf., RuPAC2016, St. Petersburg, Russia