Absolute partial electron-impact ionization cross sections of argon and nitrogen

Journal Article · Sat May 01 04:00:00 EDT 1993 · Bulletin of the American Physical Society

OSTI ID:281431

Renault, P; Straub, H C; Lindsay, B G ^[1]

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1. Rice Univ., Houston, TX (United States)

We report absolute partial electron-impact ionization cross sections measured using a time-of-flight mass spectrometer with position-sensitive detection. The design and performance of the apparatus are presented. Two-dimensional plots combining information from time-of-flight and ion impact location on the detector demonstrate the complete collection of all energetic ions produced in dissociative ionization of molecules. We report new results for ionization of argon to produce Ar{sup +}, Ar{sup 2+}, Ar{sup 3+}, and Ar{sup 4+} and for dissociative ionization of N{sub 2} giving absolute cross sections for production of N{sub 2}{sup +}, and the sum of the absolute cross sections for the production of N{sup +} and N{sub 2}{sup 2+} for electron energies between threshold 2 and 1 keV. We present an analysis of the position-sensitive TOF spectrometer data that gives information on the energy distribution of dissociatively produced fragment ions.

• OSTI ID: 281431
• Report Number(s): CONF-9305421--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 38; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ARGON
CROSS SECTIONS
ELECTRON-ATOM COLLISIONS
ELECTRON-MOLECULE COLLISIONS
IONIZATION
NITROGEN
TIME-OF-FLIGHT SPECTROMETERS