The Use of 200 KeV Protons in Scattering Studies and X-Ray Generation.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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In this report the Rutherford differential-scattering cross section is reviewed. The use of low energy protons in backscattering spectrometry is evaluated on the basis of theoretical considerations of the elastic scattering process. An expression for the determination of thin foil thickness from backscattering spectra is given. Cross sections for ionization and x-ray production for protons are discussed. Experimentally obtained cross sections from the literature for M-shell ionization are shown. Experimental results from scattering studies and x-ray generation by hydrogen ions with energies of 140 to 170 keV are given. An estimate of the relative intensity of the H and H2 ions is made on the basis of spectra obtained in scattering studies. A backscattering spectrum is used to determine thin foil thickness, and the result is compared to the known foil thickness. X-ray spectra of thorium and blood show that thorium may be detectable to the 8 ppm level and that sulphur, chlorine, and potassium can be detected in blood.
- Nuclear Physics and Elementary Particle Physics