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The G value in plasma and radiation chemistryThe application of the G-value concept to plasma chemistry is considered. A general formula which expresses the G value for a general reaction in terms of experimentally controllable parameters is derived by applying simple gas-dynamic theory to a plasma reactor with straight walls. The formula expresses the G value as a function of the electrical power absorbed, the fraction of molecules transformed, and the flow rate of the gas entering the reactor. The formula was applied to the ammonia plasma radio-frequency discharge data of d'Agostino et al. (1981); the results showed that the G(-NH3) value lies in the range of 6.0-20 molecules/100 eV, depending on the conditions. This similarity of the G(-NH3) value with Peterson's (1974) range 2.7-10 found for the gas-phase radiolysis of ammonia, suggests that there might be a common reaction mechanism initiated by inelastic electron-molecule collisions.
Document ID
19910028177
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Baird, James K.
(Alabama Univ. Huntsville, AL, United States)
Miller, George P.
(Alabama Univ. Huntsville, AL, United States)
Li, Ning
(Alabama, University Huntsville, United States)
Date Acquired
August 14, 2013
Publication Date
October 1, 1990
Publication Information
Publication: Journal of Applied Physics
Volume: 68
ISSN: 0021-8979
Subject Category
Inorganic And Physical Chemistry
Accession Number
91A12800
Funding Number(s)
CONTRACT_GRANT: NAS8-37195
Distribution Limits
Public
Copyright
Other

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