A small personnel neutron dosimeter composed of a single polycarbonate foil and four loB layers, used as CY and 'Li radiators, is described. A certain combination of the number of particles emerging from these radiators, found theoretically, is Rem equivalent in the 1 eV-1 MeV energy range. The region of the foil not masked by ' OB layers gives a measure of the fast neutron dose above 1 MeV. Theoretical and experimental studies of this dosimeter are described which show that it can also be used to extract the effective energy of the incident neutrons. The electrochemical etching conditions for revealing simultaneously the damage sites produced by a, 'Li and heavy ion recoil particles (carbon and oxygen ions due to high energy neutrons) are reported.

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