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Titolo:
Chemical dynamics of the reaction K*(5p(2)P)+H-2 -> KH(v=0;J)+H: Electronic orbital alignment effects
Autore:
Wong, TH; Kleiber, PD; Yang, KH;
Indirizzi:
Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA Univ Iowa Iowa City IA USA 52242 t Phys & Astron, Iowa City, IA 52242 USA St Ambrose Univ, Dept Phys, Davenport, IA 52803 USA St Ambrose Univ Davenport IA USA 52803 Dept Phys, Davenport, IA 52803 USA
Titolo Testata:
JOURNAL OF CHEMICAL PHYSICS
fascicolo: 14, volume: 110, anno: 1999,
pagine: 6743 - 6748
SICI:
0021-9606(19990408)110:14<6743:CDOTRK>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
STATE DISTRIBUTION; H-2; CS(7P)+H2->CSH+H; SCATTERING; MG;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Wong, TH Columbia Univ, Dept Chem, New York, NY 10027 USA Columbia Univ New York NY USA 10027 Chem, New York, NY 10027 USA
Citazione:
T.H. Wong et al., "Chemical dynamics of the reaction K*(5p(2)P)+H-2 -> KH(v=0;J)+H: Electronic orbital alignment effects", J CHEM PHYS, 110(14), 1999, pp. 6743-6748

Abstract

We report results from scattering state spectroscopic studies of the excited state reaction K*(5p P-2) + H-2 --> KH(v ", J ") + H. The final state resolved action spectra allow a direct measurement of essential features of the excited state potential surfaces, including regions of local maxima and minima. We observe a pronounced blue-wing-red-wing asymmetry in the reactive to nonreactive branching ratio, peaking in the neighborhood of a strong blue wing satellite. These results show that the dominant reaction pathway passes over a small activation barrier (350 +/- 100 cm(-1)) in Sigma(+)-likeorbital alignment. This result is consistent with an electron jump mechanism through a K+H-H ion-pair intermediate. In contrast, approach in II-like alignment leads predominantly to nonreactive scattering. Our results suggest that a combination of steric and energetic effects determine the major quenching pathways for alkali metal atom-H-2 systems. (C) 1999 American Institute of Physics.

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Documento generato il 10/07/20 alle ore 12:29:53