Role of OH radicals in the formation of oxygen molecules following vacuum ultraviolet photodissociation of amorphous solid water

Tetsuya Hama; Masaaki Yokoyama; Akihiro Yabushita; Masahiro Kawasaki

doi:10.1063/1.3474999

Role of OH radicals in the formation of oxygen molecules following vacuum ultraviolet photodissociation of amorphous solid water

Tetsuya Hama, Masaaki Yokoyama, Akihiro Yabushita, Masahiro Kawasaki

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Photodesorption of O₂ (X³∑^g _-) and O₂ (a Δ¹_g) from amorphous solid water at 90 K has been studied following photoexcitation within the first absorption band at 157 nm. Time-of-flight and rotational spectra of O₂ reveal the translational and internal energy distributions, from which production mechanisms are deduced. Exothermic and endothermic reactions of OH+O (³P) are proposed as plausible formation mechanisms for O ₂ (X ³∑_g^- and a ¹Δ _g). To examine the contribution of the O ( ³P) +O (³P) recombination reaction to the O₂ formation following 157 nm photolysis of amorphous solid water, O₂ products following 193 nm photodissociation of SO₂ adsorbed on amorphous solid water were also investigated.

Original language	English
Article number	104504
Journal	Journal of Chemical Physics
Volume	133
Issue number	10
DOIs	https://doi.org/10.1063/1.3474999
Publication status	Published - Sept 14 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

Access to Document

10.1063/1.3474999

Cite this

@article{2346451937584e8f9f8b47a5e62db0a2,

title = "Role of OH radicals in the formation of oxygen molecules following vacuum ultraviolet photodissociation of amorphous solid water",

abstract = "Photodesorption of O2 (X3∑g -) and O2 (a Δ1g) from amorphous solid water at 90 K has been studied following photoexcitation within the first absorption band at 157 nm. Time-of-flight and rotational spectra of O2 reveal the translational and internal energy distributions, from which production mechanisms are deduced. Exothermic and endothermic reactions of OH+O (3P) are proposed as plausible formation mechanisms for O 2 (X 3∑g- and a 1Δ g). To examine the contribution of the O ( 3P) +O (3P) recombination reaction to the O2 formation following 157 nm photolysis of amorphous solid water, O2 products following 193 nm photodissociation of SO2 adsorbed on amorphous solid water were also investigated.",

author = "Tetsuya Hama and Masaaki Yokoyama and Akihiro Yabushita and Masahiro Kawasaki",

note = "Funding Information: This work was supported by a Grant-in-Aid from the JSPS (Grant No. 20245005). The authors thank Dr. R. Wada of Nagoya University for useful suggestions in simulation of the rotational spectra of the O 2 molecules. ",

year = "2010",

month = sep,

day = "14",

doi = "10.1063/1.3474999",

language = "English",

volume = "133",

journal = "Journal of Chemical Physics",

issn = "0021-9606",

publisher = "American Institute of Physics Publising LLC",

number = "10",

}

TY - JOUR

T1 - Role of OH radicals in the formation of oxygen molecules following vacuum ultraviolet photodissociation of amorphous solid water

AU - Hama, Tetsuya

AU - Yokoyama, Masaaki

AU - Yabushita, Akihiro

AU - Kawasaki, Masahiro

N1 - Funding Information: This work was supported by a Grant-in-Aid from the JSPS (Grant No. 20245005). The authors thank Dr. R. Wada of Nagoya University for useful suggestions in simulation of the rotational spectra of the O 2 molecules.

PY - 2010/9/14

Y1 - 2010/9/14

N2 - Photodesorption of O2 (X3∑g -) and O2 (a Δ1g) from amorphous solid water at 90 K has been studied following photoexcitation within the first absorption band at 157 nm. Time-of-flight and rotational spectra of O2 reveal the translational and internal energy distributions, from which production mechanisms are deduced. Exothermic and endothermic reactions of OH+O (3P) are proposed as plausible formation mechanisms for O 2 (X 3∑g- and a 1Δ g). To examine the contribution of the O ( 3P) +O (3P) recombination reaction to the O2 formation following 157 nm photolysis of amorphous solid water, O2 products following 193 nm photodissociation of SO2 adsorbed on amorphous solid water were also investigated.

AB - Photodesorption of O2 (X3∑g -) and O2 (a Δ1g) from amorphous solid water at 90 K has been studied following photoexcitation within the first absorption band at 157 nm. Time-of-flight and rotational spectra of O2 reveal the translational and internal energy distributions, from which production mechanisms are deduced. Exothermic and endothermic reactions of OH+O (3P) are proposed as plausible formation mechanisms for O 2 (X 3∑g- and a 1Δ g). To examine the contribution of the O ( 3P) +O (3P) recombination reaction to the O2 formation following 157 nm photolysis of amorphous solid water, O2 products following 193 nm photodissociation of SO2 adsorbed on amorphous solid water were also investigated.

UR - http://www.scopus.com/inward/record.url?scp=77956917852&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77956917852&partnerID=8YFLogxK

U2 - 10.1063/1.3474999

DO - 10.1063/1.3474999

M3 - Article

C2 - 20849175

AN - SCOPUS:77956917852

SN - 0021-9606

VL - 133

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

IS - 10

M1 - 104504

ER -

Role of OH radicals in the formation of oxygen molecules following vacuum ultraviolet photodissociation of amorphous solid water

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this