A study of vibrationally excited N2(+) ions in the daytime thermosphere
The role of vibrationally excited N2(+) ions in the daytime thermosphere is studied. Ionization rates of the neutrals N2(+), O2(+), and O by solar extreme ultraviolet radiations with wavelengths below lambda 1050A and by impact of photoelectrons with energies between 10 to 500 eV are calculated. A photochemical model with ambipolar diffusion of ions included is used to obtain the altitude profiles of N2(+), O2(+), O(+), O(+)(P-2), O(+)(D-2), O2(+)(a(sup 4)pi(sub u)), NO(+), and N(+) ion densities. Vibrational level densities and vibrational distribution of the X(sup 2)((sigma(sub g)))(sup +), A(sup 2)pi(sub u), and B(sup 2)((sigma(sub u)))(sup +) electronic states of N2(+) ions are then calculated by taking into consideration the direct ionization-excitation of N2(+) ions by solar extreme ultraviolet radiations and photoelectron impacts, fluorescent scattering of sunlight, chemical reactions, collision with neutrals, and radiative emissions. Column emission rates for the (0,0) band at lambda 3914A, (0,1) band at lambda 4277A, (1,2) band at lambda 4236A, and (2,3) band at lambda 4199A of the N2(+) first negative band system are then computed and compared with rocket flight data.
- Research Organization:
- Pittsburgh Univ., PA (United States)
- OSTI ID:
- 6452715
- Resource Relation:
- Other Information: Ph.D. Thesis
- Country of Publication:
- United States
- Language:
- English
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Rotationally resolved pulsed field ionization photoelectron bands of O[sub 2][sup +](X [sup 2][Pi][sub 1/2,3/2g],v[sup +]=0[endash]38) in the energy range of 12. 05[endash]18. 15 eV
Rotationally resolved pulsed field ionization photoelectron bands of O{sub 2}{sup +}(X {sup 2}{Pi}{sub 1/2,3/2g},v{sup +}=0{endash}38) in the energy range of 12.05{endash}18.15 eV
Related Subjects
MOLECULAR IONS
SPATIAL DISTRIBUTION
VIBRATIONAL STATES
NITROGEN IONS
EXCITATION
ION DENSITY
IONIZATION
LEVELS
LIGHT SCATTERING
OXYGEN
OXYGEN IONS
PHOTOCHEMICAL REACTIONS
THERMOSPHERE
ULTRAVIOLET RADIATION
CHARGED PARTICLES
CHEMICAL REACTIONS
DISTRIBUTION
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
IONS
NONMETALS
RADIATIONS
SCATTERING
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)