Measurements of fast neutrons by bubble detectors

The properties of neutron bubble detectors (type BD-100 R) have been investigated with fast neutrons from D-T and Am-Be sources. The experimentally determined responses of the bubble detectors have shown considerable fluctuations (up to 50%). The response after repeated recompressions has been examined. The detectors proved to be insensitive to gammas. Measurements at various dose rates have been performed in comparison with TE chambers. Since the bubble detectors are easy to use without any power supply they may be suited for detection and location of fissionable material.