## Abstract

The densities and vibrational distributions of N _{ 2 } ^{ + } in the * X * ²Σ _{ g } ^{ + } , * A * ²Π _{ u } , and * B * ²Σ _{ u } ^{ + } states in the daytime terrestrial ionosphere are computed for both low and high solar activity. Altitude profiles of the relative populations of the vibrational levels of N _{ 2 } ^{ + } * X * ²Σ _{ g } ^{ + } are presented. The fraction of vibrationally excited N _{ 2 } ^{ + } varies from 5% at 100 km to 50% at 450 km. Several models are examined in which loss of N _{ 2 } ^{ + } ( * v * ) is enhanced for * v * > 0 and in which various assumptions are made about the vibrational distributions produced in charge transfer reactions. The N _{ 2 } ^{ + } densities are significantly reduced if N _{ 2 } ^{ + } ( * v * ) reacts with O at rates which are near gas-kinetic. Vibrational distributions of the * A * ²Π _{ u } and * B * ²Σ _{ u } ^{ + } states are also presented, as well as volume emission rates and integrated overhead intensities of the major bands of the Meinel and first negative systems.

Original language | American English |
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Journal | Journal of Geophysical Research: Space Physics |

Volume | 90 |

DOIs | |

State | Published - Jan 1 1985 |

## Keywords

- nitrogen gas
- terrestrial ionosphere
- vibrational distribution

## Disciplines

- Physical Sciences and Mathematics
- Physics