Abstract
Tracks of heavy charged particles (HCP, with Z,A(1) in solids are characterised by a strongly localised dose distribution around the path of the HCP. A method for the detection of these HCP-induced high-dose ‘spots’ in radiophotoluminescent (RPL) phosphate glasses is proposed. The relative HCP/gamma luminescence efficiency of a single HCP track is calculated within the scope of simple model, based on an analytical dose distribution formula and an adjusted gamma response function. The relative luminescence output from a single HCP track depends on the ratio of the ‘track volume’ to the glass volume illuminated by the excitation light. Thus experimental detection of HCP tracks requires a small ‘excitation volume’ which may be achieved by using a focused laser beam and flat RPL glasses. In neutron dosimetry heavy charged particles mainly arise as recoils from elastic scattering by fast neutrons. The application of the proposed method to fast neutron detection is discussed.
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