Photodissociation of H2S and the HS radical at 193.3 nm

Continetti, Robert E.; Balko, Barbara A.; Lee, Yuan T.

doi:10.1016/0009-2614(91)90097-s

Cited by 104 publications

(54 citation statements)

References 18 publications

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“…Note that the excitation wavelengths of 288 and 291 nm are insufficient to produce S͑ 1 D 2 ͒ from SH ͑X 2 ⌸, Љ=0-1͒ and SD ͑X 2 ⌸, Љ=0-2͒. The photodissociation cross sections are consistent with the work of Continetti et al 25 and Hsu et al, 26 who both reported that the S͑ 1 D 2 ͒ +H͑ 2 S 1/2 ͒ dissociation channel at 193 nm proceeds via the 2 ⌬ state. The recent work of Chen et al 27 showed that the S͑ 1 D 2 ͒ product of SH photodissociation at 121 nm mainly arises from the repulsive 2 2 ⌸ state rather than the 2 ⌬ state.…”

Section: A Photodissociation Cross Sectionssupporting

confidence: 79%

Photodissociation of vibrationally excited SH and SD radicals at 288 and 291nm: The S(D21) channel

Janssen

Loo

Groenenboom

et al. 2007

The Journal of Chemical Physics

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Section: A Photodissociation Cross Sectionssupporting

confidence: 79%

Photodissociation of vibrationally excited SH and SD radicals at 288 and 291nm: The S(D21) channel

Janssen

Loo

Groenenboom

et al. 2007

The Journal of Chemical Physics

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“…Such a suggestion is not entirely original (40,42). It is also reminiscent of the photochemistry reported recently for the SH/SD(X) fragments resulting from near UV photodissociation of H2S and D2S (45,46).…”

Section: Resultsmentioning

confidence: 66%

Near ultraviolet photolysis of phosphine studied by H atom photofragment translational spectroscopy

Lambert¹,

Morley²,

Mordaunt³

et al. 1994

Can. J. Chem.

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. Can. J. Chem. 72,977 (1 994).We report time-of-flight measurements of the H atom fragments arising in the photodissociation of phosphine at three near ultraviolet excitation wavele_ngths -2 18.2 nm, 221.6 nm, and 228.0 nm. For these wavelengths, energetic considerations dictate that ground state PH2(X) fragments must be the partner product of the primary photolysis event. The measured H atom kinetic energy distributions indicate that internal excitation of these partner fragments accounts for the major part (362%) of the available energy, in excess of that required to break the H-pH2 bond, provided by the photon. Inspection of the poorly resolved structure evident near the peak of the H atom kinetic energy distribution suggests the presence of substantial bending excitation and a-axis rotational excitation in the pH2 partner fragment. The_H atom kinetic energy distribution also shows clear evidence of atoms arising from secondary photolysis of the primary PH,(X) fragments. This second_ary photo-dissociation is observed to show a marked anisotropy, consistent with a perpendicular photo-excitation of the PH2(X) fragment. Arguments are presented which indicate that the secondary photolysis leads both to the formation of PH(X) fragments, carrying high levels of rotational excitation, and to the three-body atomisation process. On a effectuC des mesures en temps de vol des atomes d'hydrogkne, sous la forme de fragments provenant de la photodissociation de la phosphine B trois longueurs d'onde d'excitation -218,2, 221,6 et 2230 nm -proches de l'ultraviolet. Pour ces longueurs d'onde, des considCrations CnergCtiques dictent que les fragments PH2(X) de 1'Ctat fondamental doivent Etre les produits partenaires de la photolyse primaire. Les distributions de l'knergie cinCtique mesurCes pour les atomes d'hydrogbne indiquent que l'excitation interne de ces fragments partenaires tient compte de la plus grande partie (362%) de 1'Cnergie disponible B partir du photon, ce qui est supCrieur B 1'Cnergie requise pour briser la liaison H-pH2. Un examen minutieux de la structure ma1 rCsolue prCsente prks du pic de la distribution de 1'Cnergie cinCtique des atomes d'hydrogkne suggkre la prCsence d'une excitation importante de dkformation et d'une excitation rotationnelle le long de l'axe a du fragment partenaire pH2. La distribution de 1'Cnergie cinCtique des_atomes d'hydrogkne montre des preuves de la prCsence d'atomes provenant d'une photoIyse secondaire des fragments PH2(X) primaires. L'observation de cette photodissoc~ation secondaire dCmontre la prCsence d'une anisotropie marquCe qui est en accord avec une photoexcitation du fragment PH2(X). On prCsente des arguments indiquant que la photolyse secondaire conduit B la formation de fragments PH(X) portant des niveaux ClevCs d'excitation rotationnelle ainsi qu'au processus d'atomisation B trois corps.[Traduit par la redaction]

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“…Hänni, private communication). A value of the dissociation energy D 0 of the mercapto radical of 3.62 eV was accepted according to measurements by Continetti et al (1991). A solar sulfur abundance of log (S) = 7.21 (on the scale in which log (H) = 12) was adopted according to Anders & Grevesse (1989).…”

Section: Spectrum Synthesismentioning

confidence: 99%

Detection of the mercapto radical SH in the solar atmosphere

Berdyugina

Livingston

2002

A&A

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Abstract. We analyze new high-resolution UV observations of the solar photosphere in the disk center and the limb and report the first detection of SH lines in the solar atmosphere. We perform a synthesis of the solar spectrum including many atomic and molecular lines and find a few relatively unblended SH lines from which we determine the (0, 0) band oscillator strength f00 = 2.2 × 10 −3 . We conclude that these lines are excellent indicators of the sulfur abundance and isotope ratio in G and K stars.

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Photodissociation of H2S and the HS radical at 193.3 nm

Cited by 104 publications

References 18 publications

Photodissociation of vibrationally excited SH and SD radicals at 288 and 291nm: The S(D21) channel

Photodissociation of vibrationally excited SH and SD radicals at 288 and 291nm: The S(D21) channel

Near ultraviolet photolysis of phosphine studied by H atom photofragment translational spectroscopy

Detection of the mercapto radical SH in the solar atmosphere

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