ELECTRONIC EXCITATION TRANSFER BETWEEN ATOMIC AND MOLECULAR HYDROGEN
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Date
1970
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Ohio State University
Abstract
A Lyman-alpha lamp excites hydrogen atoms in a weak d.c. discharge to the 2p state, and the fluorescence spectrum is observed at right angles with a 1 meter vacuum u.v. spectrometer and lock-in detection. The Lyman bands of $H_{2}$($B^{1}\Sigma^{+}_{u}$ $v^{\prime}\leq 2\rightarrow X^{1}\Sigma^{+}_{g}$) are seen, suggesting the excitation transfer process $H^{8}$(2p)$+ H_{2}$(X, v = 2) = $H+ H_{2}{^{8}}$(B, $v\leq 2$), where the initial vibrational excitation in $H_{8}$(X), obtained in the discharge, is necessary for energetic reasons. A possible mechanism for excitation transfer involving an intermediate compound state of $H_{2}{^{-}}$ is discussed.
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Author Institution: Department of Chemistry, Yale University