### Abstract

Laser-induced fluorescence from nascent N_{2}^{+}(X ^{2}Σ_{g}^{+}) ions produced by electron impact on a N_{2} supersonic beam was observed. An analysis of the B ^{2}Σ_{u}^{+}-X ^{2}Σ _{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 N_{2}^{+} (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 language | English |
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Pages (from-to) | 6507-6512 |

Number of pages | 6 |

Journal | The Journal of Chemical Physics |

Volume | 87 |

Issue number | 11 |

DOIs | |

Publication status | Published - 1987 Jan 1 |

### ASJC Scopus subject areas

- Physics and Astronomy(all)
- Physical and Theoretical Chemistry

## Fingerprint Dive into the research topics of 'Nascent rotational distributions of N<sub>2</sub><sup>+</sup>(X <sup>2</sup>Σ<sub>g</sub><sup>+</sup>) produced by electron-impact ionization of N<sub>2</sub> in a supersonic beam'. Together they form a unique fingerprint.

## Cite this

_{2}

^{+}(X

^{2}Σ

_{g}

^{+}) produced by electron-impact ionization of N

_{2}in a supersonic beam.

*The Journal of Chemical Physics*,

*87*(11), 6507-6512. https://doi.org/10.1063/1.453433