A spectrometer for detecting and identifying light charged particles with l
ow energies (>similar to 1 MeV) is described. The spectrometer consists of
a thin CsI(Tl) crystal, an Phi Y-176 photomultiplier, and a waveform digiti
zer. Digital oscillograms of anode pulses are stored and analyzed in off-li
ne processing. In order to reconstruct the energy and specific energy losse
s, the two-component character of the scintillation fluorescence decay in a
CsI(Tl) crystal and the dependence of the fast component on the specific l
oss value are used. A digital particle identification method is proposed. T
he results of experimental studies of the CsI(TI) crystal scintillation pro
perties and efficiency in identifying electrons, protons, and a-particles i
n an energy range of similar to 1-10 MeV are presented. It is shown that th
e efficiency of the digital method for proton and a-particle identification
is 1.5-2 times higher than that of the known analog methods.