Electron impact ionization cross section of metastable N2(A Σ+u)

Autor:	Susan M. Tarr, P. B. Armentrout, Ariel Dori, R. S. Freund
Rok vydání:	1981
Předmět:	Cross section (physics) Chemistry Metastability Ionization General Physics and Astronomy Charge (physics) Physical and Theoretical Chemistry Atomic physics Ground state Beam (structure) Electron ionization
Zdroj:	The Journal of Chemical Physics. 75:2786-2794
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.442350
Popis:	The nondissociative electron impact ionization cross section of the metastable N2(A 3Σ+u) state is measured from threshold to 240 eV. Rising from an appearance potential of 10.1±0.6 eV, the cross section peaks at about 40 eV with a value of (1.14±0.36)×10−16 cm2. These values are extracted from the apparent ionization cross section of an N2 beam composed of ∼50% N2(A 3Σ+u) and ∼50% N2(X 1Σ+g). This mixed state beam is formed by charge transfer neutralization of a 1 keV N+2 beam with NO. The N2(A 3Σ+u) cross section is normalized by measuring it relative to the ionization of a ground state N2 beam formed by charge transfer neutralization of N+2 with N2.
Databáze:	OpenAIRE
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