Double-electron detachment cross sections for 5-45 keV H{sup {minus}} ions incident on he atoms

Journal Article · Tue Dec 01 04:00:00 EST 1992 · Bulletin of the American Physical Society

OSTI ID:127848

Allen, J S; Fang, X D; Kvale, T J ^[1]

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1. Univ. of Toledo, OH (United States)

The authors report absolute measurements of double-electron detachment cross sections for 5-45 keV H{sup {minus}} ions incident on He atoms. The measurements are made using a new negative-ion accelerator at the University of Toledo. The cross sections are determined by measuring the rate of growth of the H{sup +} ion current exiting a He target, as a function of increasing He target density. The cross section increases from a value of 4.0 X 10{sup {minus}17} cm{sup 2} at an impact energy of 5 keV to a value of 5.3 X 10{sup {minus}17} cm{sup 2} at 12.5 keV. Above 12.5 keV, the cross section falls to a value of 3.6 X 10{sup {minus}17} cm{sup 2} at 45 KeV. These values of the cross section are compared with previous measurements of the double-electron detachment cross section for H{sup {minus}} ions incident on He atoms.

• DOE Contract Number: FG05-88ER13971
• OSTI ID: 127848
• Report Number(s): CONF-920376--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 9 Vol. 37; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CROSS SECTIONS
ELECTRON DETACHMENT
HELIUM
HYDROGEN IONS 1 MINUS
ION-ATOM COLLISIONS
KEV RANGE 01-10
KEV RANGE 10-100