Measurement with Bonner spheres spectrometer in pulsed neutron fields

Paper presents results of measurements of neutron spectra with Bonner spheres spectrometer around radiotherapeutic linac producing undesirable photoneutrons and around plasma focus device PF-1000 in which neutrons are generated in 2H + 2H → n + 3He reaction. In the Bonner spheres an active detector, proportional counter filled with 3He, was replaced by passive one to avoid overloading of the active detector during very short period of neutrons generation. For the measurements around linac track detectors with 10B radiator were used and around plasma focus device pairs of TLDs (6LiF and 7LiF).