Measurement of Energy Loss Straggling of Relativistic Electrons in Thin Aluminum Foils

The mean energy loss straggling per unit path length of relativistic electrons in aluminum has been determined by recording electrons with a Si(Li) detector coupled to 8K multi channel analyzer. The energy loss straggling is determined by measuring the full width at half maximum of the spectrum of the incident and transmitted internal conversion electrons of energies 942 keV and 1016 keV from Bi²⁰⁷ source. Measured values have been compared with theoretical values indicating that the present method can be used for measuring mean energy loss straggling.