Fundamental Mechanisms in the Polar Cap Region.
Final rept. 2 Nov 71-30 Jun 74,
FLORIDA UNIV GAINESVILLE ENGINEERING AND INDUSTRIAL EXPERIMENT STATION
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A detailed atomic cross section DACS approach has been developed and applied to the problem of proton energy deposition in the polar cap atmosphere. Using the systematics of empirical data, expressed by simple analytic forms, in conjunction with the Born-Bethe approximation to relate proton and electron impact cross sections at high energies, a set DACS for proton and hydrogen atom impact excitation of N2, O2 and O has been assembled. Volume ionization and volume excitation rate profiles necessary for the calculation of spectral emission intensities have been obtained for arbitrary incident proton spectra. Physicochemical processes have been modeled to obtain these contributions to the spectral intensities of low-lying atomic oxygen states. A Monte Carlo method, which allows simulation of the stochastic walk in both energy and position has been developed for application to polar cap processes.
- Atmospheric Physics
- Physical Chemistry