Loading…
Photodissociation of H2O at 121.6 nm: A state-to-state dynamical picture
Photodissociation dynamics of H2O at 121.6 nm have been studied using the H atom Rydberg “tagging” time-of-flight technique and by quasiclassical trajectory (QCT) calculations. Product kinetic energy distributions and angular distributions have been measured. From these distributions, rovibronic dis...
Saved in:
Published in: | The Journal of chemical physics 2000-12, Vol.113 (22), p.10073-10090 |
---|---|
Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
cited_by | cdi_FETCH-LOGICAL-c293t-bc61f0d988a4effdbf6b55e18f33671aed5dad4f511b3c49a65905b733d378b53 |
---|---|
cites | cdi_FETCH-LOGICAL-c293t-bc61f0d988a4effdbf6b55e18f33671aed5dad4f511b3c49a65905b733d378b53 |
container_end_page | 10090 |
container_issue | 22 |
container_start_page | 10073 |
container_title | The Journal of chemical physics |
container_volume | 113 |
creator | Harich, Steven A. Hwang, Dennis W. H. Yang, Xuefeng Lin, Jim J. Yang, Xueming Dixon, Richard N. |
description | Photodissociation dynamics of H2O at 121.6 nm have been studied using the H atom Rydberg “tagging” time-of-flight technique and by quasiclassical trajectory (QCT) calculations. Product kinetic energy distributions and angular distributions have been measured. From these distributions, rovibronic distributions of the OH radical product as well as the state resolved angular anisotropy parameters were determined. The dissociation energy D00(H–OH) is determined to be 41151±5 cm−1. Two clear alternations in the OH(X,v=0) rotational distribution have been observed, with each alternation corresponding to an oscillation in the anisotropy distribution. These oscillations had been attributed to the dynamical interference between the two conical intersection pathways. Further theoretical modeling in this work strongly supports this argument. Very highly vibrationally excited OH(X) products (up to v=9) have also been observed. These are ascribed to interconversion of H–O–H bending (H–H vibration) and O–H vibration in O–H–H geometries. The effect of parent rotational excitation on the OH(A) product state distribution and anisotropy distribution was observed for the first time. Experimental results also show clear evidence for the triple dissociation channel, O(3P)+2H. Accurate branching ratios of different product channels have been determined. Results of detailed QCT calculations agree well with the experimental results in this work. |
doi_str_mv | 10.1063/1.1322059 |
format | article |
fullrecord | <record><control><sourceid>crossref</sourceid><recordid>TN_cdi_crossref_primary_10_1063_1_1322059</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>10_1063_1_1322059</sourcerecordid><originalsourceid>FETCH-LOGICAL-c293t-bc61f0d988a4effdbf6b55e18f33671aed5dad4f511b3c49a65905b733d378b53</originalsourceid><addsrcrecordid>eNotkL1OwzAYAC0EEqEw8AZeGRy-z46dmK2qoEGqVAaYI_-KoCauYjP07RHQ6W664Qi5R6gRlHjEGgXnIPUFqRA6zVql4ZJUAByZVqCuyU3OXwCALW8q0r99ppL8mHNyoyljmmmKtOd7agpFjrWi8_RE1zQXUwIrif0J9afZTKMzB3ocXflewi25iuaQw92ZK_Lx8vy-6dluv33drHfMcS0Ks05hBK-7zjQhRm-jslIG7KIQqkUTvPTGN1EiWuEabZTUIG0rhBdtZ6VYkYf_rltSzkuIw3EZJ7OcBoThd8GAw3mB-AG45UyV</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Photodissociation of H2O at 121.6 nm: A state-to-state dynamical picture</title><source>American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)</source><source>AIP_美国物理联合会现刊(与NSTL共建)</source><creator>Harich, Steven A. ; Hwang, Dennis W. H. ; Yang, Xuefeng ; Lin, Jim J. ; Yang, Xueming ; Dixon, Richard N.</creator><creatorcontrib>Harich, Steven A. ; Hwang, Dennis W. H. ; Yang, Xuefeng ; Lin, Jim J. ; Yang, Xueming ; Dixon, Richard N.</creatorcontrib><description>Photodissociation dynamics of H2O at 121.6 nm have been studied using the H atom Rydberg “tagging” time-of-flight technique and by quasiclassical trajectory (QCT) calculations. Product kinetic energy distributions and angular distributions have been measured. From these distributions, rovibronic distributions of the OH radical product as well as the state resolved angular anisotropy parameters were determined. The dissociation energy D00(H–OH) is determined to be 41151±5 cm−1. Two clear alternations in the OH(X,v=0) rotational distribution have been observed, with each alternation corresponding to an oscillation in the anisotropy distribution. These oscillations had been attributed to the dynamical interference between the two conical intersection pathways. Further theoretical modeling in this work strongly supports this argument. Very highly vibrationally excited OH(X) products (up to v=9) have also been observed. These are ascribed to interconversion of H–O–H bending (H–H vibration) and O–H vibration in O–H–H geometries. The effect of parent rotational excitation on the OH(A) product state distribution and anisotropy distribution was observed for the first time. Experimental results also show clear evidence for the triple dissociation channel, O(3P)+2H. Accurate branching ratios of different product channels have been determined. Results of detailed QCT calculations agree well with the experimental results in this work.</description><identifier>ISSN: 0021-9606</identifier><identifier>EISSN: 1089-7690</identifier><identifier>DOI: 10.1063/1.1322059</identifier><language>eng</language><ispartof>The Journal of chemical physics, 2000-12, Vol.113 (22), p.10073-10090</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c293t-bc61f0d988a4effdbf6b55e18f33671aed5dad4f511b3c49a65905b733d378b53</citedby><cites>FETCH-LOGICAL-c293t-bc61f0d988a4effdbf6b55e18f33671aed5dad4f511b3c49a65905b733d378b53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,782,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Harich, Steven A.</creatorcontrib><creatorcontrib>Hwang, Dennis W. H.</creatorcontrib><creatorcontrib>Yang, Xuefeng</creatorcontrib><creatorcontrib>Lin, Jim J.</creatorcontrib><creatorcontrib>Yang, Xueming</creatorcontrib><creatorcontrib>Dixon, Richard N.</creatorcontrib><title>Photodissociation of H2O at 121.6 nm: A state-to-state dynamical picture</title><title>The Journal of chemical physics</title><description>Photodissociation dynamics of H2O at 121.6 nm have been studied using the H atom Rydberg “tagging” time-of-flight technique and by quasiclassical trajectory (QCT) calculations. Product kinetic energy distributions and angular distributions have been measured. From these distributions, rovibronic distributions of the OH radical product as well as the state resolved angular anisotropy parameters were determined. The dissociation energy D00(H–OH) is determined to be 41151±5 cm−1. Two clear alternations in the OH(X,v=0) rotational distribution have been observed, with each alternation corresponding to an oscillation in the anisotropy distribution. These oscillations had been attributed to the dynamical interference between the two conical intersection pathways. Further theoretical modeling in this work strongly supports this argument. Very highly vibrationally excited OH(X) products (up to v=9) have also been observed. These are ascribed to interconversion of H–O–H bending (H–H vibration) and O–H vibration in O–H–H geometries. The effect of parent rotational excitation on the OH(A) product state distribution and anisotropy distribution was observed for the first time. Experimental results also show clear evidence for the triple dissociation channel, O(3P)+2H. Accurate branching ratios of different product channels have been determined. Results of detailed QCT calculations agree well with the experimental results in this work.</description><issn>0021-9606</issn><issn>1089-7690</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNotkL1OwzAYAC0EEqEw8AZeGRy-z46dmK2qoEGqVAaYI_-KoCauYjP07RHQ6W664Qi5R6gRlHjEGgXnIPUFqRA6zVql4ZJUAByZVqCuyU3OXwCALW8q0r99ppL8mHNyoyljmmmKtOd7agpFjrWi8_RE1zQXUwIrif0J9afZTKMzB3ocXflewi25iuaQw92ZK_Lx8vy-6dluv33drHfMcS0Ks05hBK-7zjQhRm-jslIG7KIQqkUTvPTGN1EiWuEabZTUIG0rhBdtZ6VYkYf_rltSzkuIw3EZJ7OcBoThd8GAw3mB-AG45UyV</recordid><startdate>20001208</startdate><enddate>20001208</enddate><creator>Harich, Steven A.</creator><creator>Hwang, Dennis W. H.</creator><creator>Yang, Xuefeng</creator><creator>Lin, Jim J.</creator><creator>Yang, Xueming</creator><creator>Dixon, Richard N.</creator><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20001208</creationdate><title>Photodissociation of H2O at 121.6 nm: A state-to-state dynamical picture</title><author>Harich, Steven A. ; Hwang, Dennis W. H. ; Yang, Xuefeng ; Lin, Jim J. ; Yang, Xueming ; Dixon, Richard N.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c293t-bc61f0d988a4effdbf6b55e18f33671aed5dad4f511b3c49a65905b733d378b53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Harich, Steven A.</creatorcontrib><creatorcontrib>Hwang, Dennis W. H.</creatorcontrib><creatorcontrib>Yang, Xuefeng</creatorcontrib><creatorcontrib>Lin, Jim J.</creatorcontrib><creatorcontrib>Yang, Xueming</creatorcontrib><creatorcontrib>Dixon, Richard N.</creatorcontrib><collection>CrossRef</collection><jtitle>The Journal of chemical physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Harich, Steven A.</au><au>Hwang, Dennis W. H.</au><au>Yang, Xuefeng</au><au>Lin, Jim J.</au><au>Yang, Xueming</au><au>Dixon, Richard N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photodissociation of H2O at 121.6 nm: A state-to-state dynamical picture</atitle><jtitle>The Journal of chemical physics</jtitle><date>2000-12-08</date><risdate>2000</risdate><volume>113</volume><issue>22</issue><spage>10073</spage><epage>10090</epage><pages>10073-10090</pages><issn>0021-9606</issn><eissn>1089-7690</eissn><abstract>Photodissociation dynamics of H2O at 121.6 nm have been studied using the H atom Rydberg “tagging” time-of-flight technique and by quasiclassical trajectory (QCT) calculations. Product kinetic energy distributions and angular distributions have been measured. From these distributions, rovibronic distributions of the OH radical product as well as the state resolved angular anisotropy parameters were determined. The dissociation energy D00(H–OH) is determined to be 41151±5 cm−1. Two clear alternations in the OH(X,v=0) rotational distribution have been observed, with each alternation corresponding to an oscillation in the anisotropy distribution. These oscillations had been attributed to the dynamical interference between the two conical intersection pathways. Further theoretical modeling in this work strongly supports this argument. Very highly vibrationally excited OH(X) products (up to v=9) have also been observed. These are ascribed to interconversion of H–O–H bending (H–H vibration) and O–H vibration in O–H–H geometries. The effect of parent rotational excitation on the OH(A) product state distribution and anisotropy distribution was observed for the first time. Experimental results also show clear evidence for the triple dissociation channel, O(3P)+2H. Accurate branching ratios of different product channels have been determined. Results of detailed QCT calculations agree well with the experimental results in this work.</abstract><doi>10.1063/1.1322059</doi><tpages>18</tpages></addata></record> |
fulltext | fulltext |
identifier | ISSN: 0021-9606 |
ispartof | The Journal of chemical physics, 2000-12, Vol.113 (22), p.10073-10090 |
issn | 0021-9606 1089-7690 |
language | eng |
recordid | cdi_crossref_primary_10_1063_1_1322059 |
source | American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list); AIP_美国物理联合会现刊(与NSTL共建) |
title | Photodissociation of H2O at 121.6 nm: A state-to-state dynamical picture |
url | http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-25T13%3A24%3A15IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-crossref&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Photodissociation%20of%20H2O%20at%20121.6%20nm:%20A%20state-to-state%20dynamical%20picture&rft.jtitle=The%20Journal%20of%20chemical%20physics&rft.au=Harich,%20Steven%20A.&rft.date=2000-12-08&rft.volume=113&rft.issue=22&rft.spage=10073&rft.epage=10090&rft.pages=10073-10090&rft.issn=0021-9606&rft.eissn=1089-7690&rft_id=info:doi/10.1063/1.1322059&rft_dat=%3Ccrossref%3E10_1063_1_1322059%3C/crossref%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c293t-bc61f0d988a4effdbf6b55e18f33671aed5dad4f511b3c49a65905b733d378b53%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |