Modified atomic number dependence of total bremsstrahlung spectra in compounds

Abstract

The total bremsstrahlung (BS) generated in compounds of BaCl2 .2H2 O, CuCl2: 2H2 O, Pb(CH3 COO)2 .3H2 O,PbCl2 , Pb(NO3)2 , and CuSO4 .5H2 O by 90 Sr was investigated using a Si(Li) detector to determine the dependenceof the BS spectra on the modified atomic number (Zmod) of compounds in the photon energy range of 1–100 keV. Acontinuous decrease in the Zmod dependence of the bremsstrahlung spectra in the energy range of 1–30 keV was observed,followed by a slow increase thereafter, i.e. in the range of 30–100 keV. The stronger Zmod dependence of the spectra atlow photon energy was expected to be the result of the high intensity of polarization bremsstrahlung (PB) at low photonenergy, increased interference of ordinary bremsstrahlung and PB, and interference by bremsstrahlung from differentatoms of the compounds in these compounds.