Analyzing method using a detector of alpha particles

A method for analyzing, using a detector of alpha particles, a sample comprising at least one radionuclide emitter of a plurality of alpha particles, the detector comprising a detection medium and a plurality of measurements cells configured for measuring at least one incident signal generated by an interaction of an alpha particle with the detection medium, the detector being configured to deliver an autoradiographic image of the sample, the method comprising the following steps:

• determining an initial energy of each alpha particle, the determining of the initial energy comprising repeating the following sub-steps for each alpha particle:
• determining a position of a first interaction of an alpha particle with the detection medium of the detector by using at least one measurement cell,
• determining an energy deposited by the particle in the interior of the detector by using the measured incident signal, and
• determining, by using the determined energy deposited by the particle, the initial energy of the alpha particle before the first interaction of the alpha particle with the detection medium of the detector;
• and
• for at least one zone of the autoradiographic image, constructing an energy spectrum using the determined initial energies of the corresponding alpha particles.