The production and characterization by resonance enhanced multiphoton ionization of H2(v=10-14) from photodissociation of H2S

Article abstract of DOI:10.1063/1.457430

The excitation of H2S at 66 000 cm^-1 by two-photon absorption is shown to produce significant quantities of H2 molecules in very high vibrational, but low rotational levels.The vibrationally excited H2 has been identified by a 2 + 1 + 1 resonance enhanced multiphoton ionization ( REMPI ) process in whch the <*> state is excited as an intermediate state.The major contribution of this double well state comes from the outer <*> well be cause of the large H2 bond distance in the nascent H2(v) photoproduct.Excitation of the <*> state by a 291 nm photon dissociates the molecule to the H + H* ( n = 3 ) products, and the excited atom is then ionized by a fourth photon.The analysis of the photoelectron spectra ( PES ) demonstrates that the intermediate H2S* molecule preferentially dissociates to vibrationally excited H2 molecules rather than ionizing by the absorption of an additional photon.It appears likely that the photodissociation of H2S is a practical method for producing highly vibrationally excited, but rotationally cool, H2 molecules for further dynamical studies.

Full text of DOI:10.1063/1.457430

The production and characterization by resonance enhanced multiphoton ionization
of H2(v=10–14) from photodissociation of H2S
Jhobe Steadman and Tomas Baer
Citation: The Journal of Chemical Physics 91, 6113 (1989); doi: 10.1063/1.457430
View online: http://dx.doi.org/10.1063/1.457430
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/91/10?ver=pdfcov
Published by the AIP Publishing
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
141.212.109.170 On: Thu, 18 Dec 2014 13:03:28

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
141.212.109.170 On: Thu, 18 Dec 2014 13:03:28

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
141.212.109.170 On: Thu, 18 Dec 2014 13:03:28

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
141.212.109.170 On: Thu, 18 Dec 2014 13:03:28

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
141.212.109.170 On: Thu, 18 Dec 2014 13:03:28

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
141.212.109.170 On: Thu, 18 Dec 2014 13:03:28