The effect of energy losses in alpha-particle sources on the shape of peaks in spectra obtained with wide-angle geometry.
It has been shown that two main effects contribute to the tailing in the shapes of alpha-peaks measured with silicon detectors: the ionization loss in the source and the response of the detector. We studied the relative influence of both factors in measurements with small source-to-detector distances. The computer simulation code 'the stopping and range of ions in matter' has been used to obtain the energy spectra of a 226Ra source as a function of the source thickness. Results of the simulation are compared with experimental measurements.
Martín Sánchez
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Departamento de Física, Universidad de Extremadura, Badajoz, Spain. ams@unex.es
Fernández Timón
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Rubio Montero
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MP