Effects of target thickness on the shape of the bremsstrahlung energy spectrum of Pb in the photon energy region of 1–100 keV

The effects of target thickness on the shape of the bremsstrahlung energy spectrum in Pb for 89Sr beta particles are studied in the photon energy region of 1–100 keV. The thicknesses of the Pb targets chosen for present study are 53, 223, 552, 677, 908 and 1352 mg/cm2. The bremsstrahlung energy spectrum, only at target thickness of 677 mg/cm2 is found to be closer to the Avdonina and Pratt (1999) theory for total bremsstrahlung with the variation of +3%, −2%, +2%, −13%, −39% and 69% at 1, 4, 10, 30, 60 and 100 keV, respectively. The polarization bremsstrahlung is limited up to a particular target thickness at low-energy region, suppressing the bremsstrahlung at high-energy region.