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Van Zyl & Neumann 1980
Van Zyl, B. and Neumann, H. (1980). Ha and Hß Emission Cross Sections for Low-Energy H and H+ Collisions With N2 and O2. Journal of Geophysical Research 85: doi: 10.1029/JA080i011p06006. issn: 0148-0227.

Absolute cross sections for the emission alpha and Balmer beta radiations from H and H+ collisions with N2 and O2 are reported. The H and H+ projectile energies ranged between about 50 eV and 2.5 keV. For projectile energies above 300 eV, the contributions to these radiations from decay of the long-lived 3s and 4s excited states of hydrogen were resolved. The emission cross sections for the case of H atom impact were found to be substantially larger than those for H+ impact. The results are discussed within the context of their application to analysis of the hydrogen aurora.

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Journal of Geophysical Research
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American Geophysical Union
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