Source:http://linkedlifedata.com/resource/pubmed/id/21599063
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| Predicate | Object |
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| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
19
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| pubmed:dateCreated |
2011-5-23
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| pubmed:abstractText |
The nuclear spin dependence of the chemical reaction H(3)(+)+ H(2) ? H(2)?+ H(3)(+) has been studied in a hollow cathode plasma cell. Multipass infrared direct absorption spectroscopy has been employed to monitor the populations of several low-energy rotational levels of ortho- and para-H(3)(+) (o-H(3)(+) and p-H(3)(+)) in hydrogenic plasmas of varying para-H(2) (p-H(2)) enrichment. The ratio of the rates of the proton hop (k(H)) and hydrogen exchange (k(E)) reactions ? ? k(H)/k(E) is inferred from the observed p-H(3)(+) fraction as a function of p-H(2) fraction using steady-state chemical models. Measurements have been performed both in uncooled (T(kin) ? 350 K) and in liquid-nitrogen-cooled (T(kin) ? 135 K) plasmas, marking the first time this reaction has been studied at low temperature. The value of ? has been found to decrease from 1.6 ± 0.1 at 350 K to 0.5 ± 0.1 at 135 K.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
May
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| pubmed:issn |
1089-7690
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| pubmed:author | |
| pubmed:copyrightInfo |
© 2011 American Institute of Physics.
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| pubmed:issnType |
Electronic
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| pubmed:day |
21
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| pubmed:volume |
134
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
194311
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| pubmed:year |
2011
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| pubmed:articleTitle |
Nuclear spin dependence of the reaction of H(3)+ with H2. II. Experimental measurements.
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| pubmed:affiliation |
Department of Chemistry, University of Illinois, Urbana, Illinois 61801, USA.
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| pubmed:publicationType |
Journal Article
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