Consistency test of double ionization of helium by photons and charged particles
- Department of Physics, Tulane University, New Orleans, Louisiana 70118 (United States)
- Department of Physics, University of Tennessee, Knoxville, Tennessee 37996 (United States)
We have performed a consistency test of recent data for the ratios of cross sections of double to single ionization of helium by photons and by fast charged particles. It is based on a relationship that connects the dipole and nondipole components of cross sections by charged particle impact to photoionization and Compton scattering, respectively. We find the high energy ratio {ital R}{sub {ital Z}} for charged particles to be a sensitive probe of the photoionization data near threshold. Using recent experimental data for photoionization, the asymptotic ratio {ital R}{sub {ital Z}} is found to range from 0.240{percent} to 0.295{percent}, as compared with direct experimental measurement of 0.26{percent}. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Oak Ridge National Laboratory
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 285943
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 54; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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