A High-Resolution N2 Absorption Study from 730 to 980 A.
Rept. for Apr 68-Dec 70,
AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
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The absorption spectrum of N2 obtained photoelectrically at a bandwidth of 0.04 A from 730 to 980 A is presented and compared to earlier, broader band measurements. At wavelengths longer than the ionization edge at 796 A the peak abosrption cross sections and consequently band oscillator strengths show a highly variable dependence on the number density of absorbing molecules in the light path, which is caused by saturation and bandwidth effects. The results of an attempt to obtain band oscillator strengths in the limit at low column numbers 10 to the 14th power moleculessq cm are given. Absolute values for a set of lower limits on the cross sections are given, the structure id identified, and results are compared to those of Cook and Metzger, Huffman et al., and Cook and Ogawa. Optical oscillator strengths are compared to those of Lawrence et al. for the four bands in the interval from 958 to 972 A. Author
- Atmospheric Physics
- Atomic and Molecular Physics and Spectroscopy