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A remarkable temperature dependence of the rate constant for the tunneling reaction HD + D → H + D2 in the low temperature region 2.6–6.5 K

✍ Scribed by Takayuki Kumada; Kenji Komaguchi; Yasuyuki Aratono; Tetsuo Miyazaki

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
249 KB
Volume
261
Category
Article
ISSN
0009-2614

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✦ Synopsis

Rate constants for the tunneling reaction, HD + D ~ H + D 2, in solid HD have been determined by using ESR in the very low temperature range of 2.6-6.5 K. The rate constants increase steeply with increasing temperature above 5 K, while they are almost independent of temperature below 5 K. The results above 5 K do not coincide with theoretical values calculated by the gas phase model. A phonon-assisted mechanism is proposed to account for the remarkable temperature dependence of the tunneling reaction in solid HD.

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