Published 1993 | Version v1
Report Open

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

Creators

  • 1. Los Alamos National Lab., NM (United States)
  • 2. SFA, Inc., Landover, MD (United States)
  • 3. Nebraska Univ., Lincoln, NE (United States)

Description

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 ∼ 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%

Availability note (English)

MF available from INIS under the Report Number; Also available from OSTI as DE94000884; NTIS; US Govt. Printing Office Dep.

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Additional details

Publishing Information

Imprint Pagination
15 p.
Report number
LA-UR--93-3426

Conference

Title
Double ionization in He.
Dates
4 Oct 1993.
Place
Argonne, IL (United States).

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
25024280
Subject category
S74: ATOMIC AND MOLECULAR PHYSICS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
COMPTON EFFECT; CROSS SECTIONS; HELIUM; PHOTOIONIZATION; PHOTON-ATOM COLLISIONS; SCATTERING
Descriptors DEC
ATOM COLLISIONS; BASIC INTERACTIONS; COLLISIONS; ELASTIC SCATTERING; ELECTROMAGNETIC INTERACTIONS; ELEMENTS; INTERACTIONS; IONIZATION; NONMETALS; PHOTON COLLISIONS; RARE GASES

Optional Information

Contract/Grant/Project number
Contract W-7405-ENG-36
Funding organization
USDOE, Washington, DC (United States).
Secondary number(s)
CONF-9310190--1.