FIELD: radiation.
SUBSTANCE: invention relates to radiation measurements and can be used for detecting neutron radiation mono directional flow density at nuclear-physical units of different types and purposes. Mono directed neutron radiation has made from materials with close effective atomic numbers of housing, metal collector, hydrogenous and does not contain hydrogen dielectric plates, wherein collector is made in form of two plates separated by electrostatic screen thickness equal to mileage formed gamma-radiation of secondary electrons, and are connected through subtraction circuit to electro-measuring instrument, besides, between each of collector plates and housing there are dielectric plates of hydrogen-containing material, and between plates and electrostatic screen there are dielectric plates made from material not containing hydrogen.
EFFECT: technical result is reduction of mono directional neutron radiation detector sensitivity to attendant gamma-radiation during operation in fields of mixed gamma-neutron radiation.
1 cl, 2 dwg
