Measurements of alpha particle energy using nuclear tracks in solids methodology

In this paper we present a method for the measurement of alpha article energy using polycarbonate materials as nuclear track detectors (NTDs). This method is based on the interaction of the radiation with the solid-state materials, using the relationship between the energy deposited in the material by the ionising article and the track developed after an established chemical process. The determination of the geometrical parameters of the ormed track, such as major axis, minor axis and overall track length, permit determination of the energy of the alpha article. The track analysis is performed automatically using a digital image system, and the data are processed in a PC with commercial software. In this experiment ¹⁴⁸Gd, ²³⁸U, ²³⁰Th, ²³⁹Pu and ³⁴⁴Cm alpha particle emitters were used. The values for alpha article energy resolution, the linear response to energy, the confidence in the results and the automatisation of the procedure make his method a promising analysis system.