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The effect of Compton scattering on the double to single ionization ratio in helium

Conference ·
OSTI ID:10185039
 [1];  [2]; ;  [3]
  1. Los Alamos National Lab., NM (United States)
  2. SFA, Inc., Landover, MD (United States)
  3. Nebraska Univ., Lincoln, NE (United States)
The ratio of double to single ionization in Helium produced by photon impact has been measured for photon energies from 2.1 to 5.5 keV. The measurements suggest that a significant contribution to the single ionization cross section is caused by Compton scattering for energies greater than {approximately} 3.8 keV. After accounting for the ionizing Compton scattering the measured ratio is not inconsistent with recent calculations of the asymptotic limit of the ionization ratio caused by photoabsorption which predict a limit near 1.66%.
Research Organization:
Los Alamos National Lab., NM (United States)
Sponsoring Organization:
USDOE, Washington, DC (United States)
DOE Contract Number:
W-7405-ENG-36
OSTI ID:
10185039
Report Number(s):
LA-UR--93-3426; CONF-9310190--1; ON: DE94000884
Country of Publication:
United States
Language:
English

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