Effect of Compton scattering on the double-to-single photoionization ratio in helium

Journal Article · Sun Oct 01 00:00:00 EDT 1995 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.52.2829· OSTI ID:118449

Sagurton, M; Bartlett, R J; Samson, J A.R.; He, Z X; Morgan, D ^[1]

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1. SFA, Inc., 1401 McCormick Drive, Landover, Maryland 20785 (United States)

The effect of Compton scattering on the ratio of double-to-single ionization from photon impact in helium has been measured for 2.1{le}{ital h}{nu}{le}5.5 keV using a time-of-flight ion spectrometer with a high relative collection efficiency for Compton ions. Single ionization from Compton scattering is found to contribute measurably to a reduction in the ionization ratio for {ital h}{nu}{approx_gt}3.5 keV. Our measurements are compared with predictions based on recent calculations of the single and double ionization cross sections for photoabsorption and Compton scattering by Hino {ital et} {ital al}. [Phys. Rev. A {bold 48}, 1271 (1993), Phys. Rev. Lett. {bold 72}, 1620 (1994)], Andersson {ital et} {ital al}. [Phys. Rev. Lett. {bold 71}, 50 (1993)], and Suric {ital et} {ital al}. [Phys. Rev. Lett. {bold 73}, 790 (1994)].

• OSTI ID: 118449
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 4 Vol. 52; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COMPTON EFFECT
HELIUM
KEV RANGE 01-10
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS
SCATTERING