Abstract

The analytical formulas of the surface emitted energy spectra of an alpha infinite flat source are derived, using the derived formulas of the distribution of residual range of alpha particles, considering the different thicknesses of the source and the absorbing layer. Utilizing these formulas, the typical residual range distributions and the energy spectra of alpha particles have been calculated and shown in figures. The variation tendency of the calculated spectrum is in good agreement with the measured spectrum.

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