Nascent rotational distributions of N2+(X 2Σg+) produced by electron-impact ionization of N2 in a supersonic beam

Takashi Nagata, Atsushi Nakajima, Tamotsu Kondow, Kozo Kuchitsu

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Laser-induced fluorescence from nascent N2+(X 2Σg+) ions produced by electron impact on a N2 supersonic beam was observed. An analysis of the B 2Σu+-X 2Σ g+ (0,0) band shows that the rotational state distributions cannot be represented by a single Boltzmann function, higher N″ levels being overpopulated. Experimental and analytical efforts were made to minimize the influence of cascading and relaxation on the rotational distributions. The rotational energy of N2+ (X) thus estimated increases with decreasing electron energy from 2.26±0.16 meV at 300 eV to 4.24±0.27 meV at 25 eV. This trend is explained qualitatively in terms of angular momentum transfer through multipole electron-molecule interactions.

Original languageEnglish
Pages (from-to)6507-6512
Number of pages6
JournalThe Journal of Chemical Physics
Volume87
Issue number11
Publication statusPublished - 1987

Fingerprint

Impact ionization
electron impact
ionization
Electrons
rotational states
laser induced fluorescence
multipoles
momentum transfer
Momentum transfer
angular momentum
Angular momentum
electron energy
trends
Fluorescence
Ions
molecules
ions
Molecules
electrons
Lasers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Nascent rotational distributions of N2+(X 2Σg+) produced by electron-impact ionization of N2 in a supersonic beam. / Nagata, Takashi; Nakajima, Atsushi; Kondow, Tamotsu; Kuchitsu, Kozo.

In: The Journal of Chemical Physics, Vol. 87, No. 11, 1987, p. 6507-6512.

Research output: Contribution to journalArticle

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