The Reactions of <SUP>80</SUP>Br Activated by Isomeric Transition in the Gaseous Phase. The Isotopic Variation between CH<SUB>4</SUB> and CD<SUB>4</SUB>

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概要

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• The roles of the excess kinetic energy and the thermal ionic processes in the reaction of the <SUP>80</SUP>Br from the isomeric transition of <SUP>80m</SUP>Br in gaseous CH<SUB>4</SUB> and CD<SUB>4</SUB> were investigated using a rare gas additive. A possible isotope effect has appeared on the substitution reaction of the energetic Br atom to form CH<SUB>3</SUB><SUP>80</SUP>Br or CD<SUB>3</SUB><SUP>80</SUP>Br, but not on the thermal processes to form CH<SUB>3</SUB><SUP>80</SUP>Br and CH<SUB>2</SUB><SUP>80</SUP>BrBr or their isotopic alternatives. At a zero mole fraction of moderator, the CH<SUB>3</SUB><SUP>80</SUP>Br/CD<SUB>3</SUB><SUP>80</SUP>Br ratio for the energetic process was found to be 2.7±0.3. This is consistent with the moderator and/or probability integral isotope effects. However, in a highly moderated system the results indicated that the former effect is more important than the latter. Furthermore it can be inferred from the total pressure effects on the energetic reaction products that the excited primary products are able to decompose unimolecularly due to internal excitation.

• 公益社団法人 日本化学会の論文

著者

• Kahara Toshiki

  Japan Atomic Energy Research Institute

• TACHIKAWA Enzo

  Japan Atomic Energy Research Institute

関連論文

• Gamma-Radiolysis of Aqueous Boric Acid Solution
• The Reactions of 80Br Activated by Isomeric Transition in the Gaseous Phase. The Isotopic Variation between CH4 and CD4

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