FIELD: physics.
SUBSTANCE: disclosed working medium for a thermoluminescent neutron detector contains the following: NaF, and UO2(NO3)2, additionally contains lithium fluoride LiF, scandium fluoride ScF3 and copper fluoride CuF2, with the following ratio of ingredients (mol %): LiF 99.887-99.988, NaF 0.0005-0.002, UO2(NO3)2 0.006-0.01, ScF3 0.005-0.1, CuF2 0.0005-0.001.
EFFECT: high detector sensitivity.