CALIBRATION OF CA8015 CELLULOSE NITRATE FOR FAST-NEUTRON DOSIMETRY

The efficiencies of the cellulose nitrate plastic CA8015† † Manufactured by Kodak-Pathé of France. are measured for the registration of charged-particle tracks resulting from the interaction of fast neutrons, of energies ranging from 0.57 to 19.1 MeV, with the nuclear constituents of the plastic. Particular attention is paid to the triple-α events, 12C(n, n′)3 α. The optimization of etching times and the effect of counting the 'front' or the 'back' surface of the detector are discussed in the paper. The variation of triple-track density with neutron energy, and the energy dependence of the 3 α-reaction cross section are investigated. © 1979.