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Summary. Recent laboratory studies of collision processes leading to the destruction of atmospheric He(2³S) metastable atoms have prompted a recalculation of the intensity of solar 10,830-Å radiation resonantly scattered by such metastables in the earth's upper atmosphere. The results of the calculation are in satisfactory agreement with observations. Assumptions in the calculation and their implications are discussed.
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Rundel et al. (1974) studied this question.
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