Experimental Investigation of Thick Target Bremsstrahlung Radiation Produced by Electrons of 1.00, 1.50 and 2.00 MeV

Abstract

Measurementshave been made of the 0" bremsstrahlung spectrum emerging from thick targets of polystyrene, aluminum, coppcr, silver and gold bombarded by monoenergetic electrons of 1.0 MeV, 1.5 MeV and 2.0 MeV. The measurements were made using a 4 in. diameter by 4 in. long NaI(T1) scintillation detector unit with a lead shield and collimator. The pulse-height spectra were recorded in a twenty-channel, pulse-height analyzer and were converted to photon spectra using an experimentally determined response matrix for the scintillation detector. Corrections and errors arc discussed and the results are plotted as families of curvcs of number of photons per mega-electron volt per microampere pcr steradian at zero degrees vs. photon energy. Comparisons are made with some elementary semi-empirical prcdictions of thick target bremsstrahlung spectrum shapes.

Energetic electron beam generation and anisotropy of hard x-ray emission from 0.9 to 1.0 MA high-Z X pinches

“…For this spectral analysis, data on bremsstrahlung spectra produced at different electron energies for targets with various atomic numbers from Ref. 19 were used.…”

Physical aspects of irradiation: recommendations of the International Commission on Radiological Units and Measurements (ICRU) report 10B 1962

“…Each curve is multiplied by 10" for clarity of presentation. (Edelsack et al, 1960). use the radioactive material is enclosed in a metal capsule which effectively absorbs the beta radiation.…”