Consistency test of double ionization of helium by photons and charged particles

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.54.613· OSTI ID:285943

Wang, J; McGuire, J H ^[1]; Burgdoerfer, J; Qiu, Y ^[2]

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1. Department of Physics, Tulane University, New Orleans, Louisiana 70118 (United States)
2. 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

Related Subjects

66 PHYSICS
COMPTON EFFECT
CROSS SECTIONS
HELIUM
ION-ATOM COLLISIONS
MULTICHARGED IONS
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS