The Effect of Minute Quantities of Impurities on Shock Tube Kinetics. The Reaction H2 + D2 Yields 2HD,
HEBREW UNIV JERUSALEM (ISRAEL) DEPT OF PHYSICAL CHEMISTRY
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An ultra-clean 2 in I.D. single pulse shock tube coupled to an atomic resonance absorption detection system was constructed in order to determine H atom concentration by Lyman-alpha absorption. The shock tube with its LiF windows was baked to 300 C and pumped down to approx. 10 to the minus 7th power torr under this baking temperature. Ultra-pure argon could be shock heated to approx. 2500 K with no spurious H atom absorption. The system was constructed in order to study the kinetics of chemical reactions, where are strongly catalyzed by H atoms, under the conditions where no such atoms are detected.