Author/Authors :
Boreiko، نويسنده , , V.F. and Bystritsky، نويسنده , , V.M and Grebenyuk، نويسنده , , V.M and Ivanov، نويسنده , , A.I. and Kalinin، نويسنده , , A.I. and Krylov، نويسنده , , A.R. and Parzhitsky، نويسنده , , S.S. and Slepnev، نويسنده , , V.M. and Stolupin، نويسنده , , V.A. and Wozniak، نويسنده , , J.، نويسنده ,
Abstract :
A possibility of using a thermal neutron detector in the high γ-quantum and bremsstrahlung fields is considered in the paper. The design of the thermal neutron detector consisting of 10 counters filled with 3He under the pressure of 2 atm and enclosed in the polyethylene moderator is described. The results of measuring the neutron recording efficiency and neutron lifetimes by this detector exposed to a neutron flux from the dt-reaction and from the 252Cf and Pu–Be sources are reported. The thicknesses of the polyethylene moderator and the Pb layer used for suppression of the background in the fields of powerful electromagnetic radiation are optimized.
