{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,4]],"date-time":"2026-03-04T16:29:17Z","timestamp":1772641757927,"version":"3.50.1"},"reference-count":33,"publisher":"AIP Publishing","issue":"9","funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"crossref","award":["22173082"],"award-info":[{"award-number":["22173082"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"crossref","award":["21773213"],"award-info":[{"award-number":["21773213"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Zhejiang Provincial Natural Science Foundation of China","award":["LY22B030005"],"award-info":[{"award-number":["LY22B030005"]}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2026,3,7]]},"abstract":"<jats:p>The OCS photodissociation dynamics of the minor triplet S(3PJ=2, 1, 0) channels across the first UV absorption band (202\u2013248\u00a0nm) have been studied using the time-sliced velocity-mapped ion imaging technique. Wavelength-dependent dynamical features are directly revealed from the sliced images of the S(3PJ=2, 1, 0) photofragments. The internal energy distributions of the counter CO fragments exhibit a vibrational progression, superimposed by a dominant high-energy feature characterized by low vibrational but high rotational excitation. In addition, a minor fraction of extremely high rotationally excited CO(v = 0, 1) is observed near the limitation of available energy. The relative populations of these components show pronounced dependences on both photolysis wavelength and spin\u2013orbit state. The internal-energy-dependent anisotropy parameters \u03b2(Eint), combined with insights from potential energy surfaces, indicate distinct dissociation mechanisms. The large positive \u03b2(Eint) values for both the dominant highly rotationally excited CO and a substantial population of vibrationally excited CO support a dissociation mechanism dominated by intersystem crossing from the initially excited 21A\u2032 (and minor 11A\u2033) state to the dissociative triplet 23A\u2033 state. In contrast, the minor component of extremely high rotationally excited CO is generated via a two-step nonadiabatic pathway involving internal conversion from the 21A\u2032 state to the ground state followed by intersystem crossing to the triplet 13A\u2032 or 13A\u2033 state, which yields near-zero or small negative \u03b2(Eint) values due to the nonaxial recoil effect. Furthermore, an abrupt drop in \u03b2(Eint) for low vibrationally excited CO fragments near 223\u00a0nm suggests an additional contribution from direct excitation to the triplet 23A\u2033 state and its subsequent nonadiabatic dissociation.<\/jats:p>","DOI":"10.1063\/5.0315169","type":"journal-article","created":{"date-parts":[[2026,3,4]],"date-time":"2026-03-04T11:41:58Z","timestamp":1772624518000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":0,"title":["Photodissociation dynamics of the OCS +\n                    <i>hv<\/i>\n                    \u2192 CO(1\u03a3+) + S(3P\n                    <i>J<\/i>\n                    =2, 1, 0) in the first UV absorption band"],"prefix":"10.1063","volume":"164","author":[{"given":"Xiaolan","family":"Zou","sequence":"first","affiliation":[{"name":"Hangzhou Institute of Advanced Studies, Zhejiang Normal University 1 , 1108 Gengwen Road, Hangzhou 311231, Zhejiang Province,","place":["People\u2019s Republic of China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qian","family":"Xiao","sequence":"additional","affiliation":[{"name":"Hangzhou Institute of Advanced Studies, Zhejiang Normal University 1 , 1108 Gengwen Road, Hangzhou 311231, Zhejiang Province,","place":["People\u2019s Republic of China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sha","family":"Tan","sequence":"additional","affiliation":[{"name":"Hangzhou Institute of Advanced Studies, Zhejiang Normal University 1 , 1108 Gengwen Road, Hangzhou 311231, Zhejiang Province,","place":["People\u2019s Republic of China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xueming","family":"Yang","sequence":"additional","affiliation":[{"name":"Hangzhou Institute of Advanced Studies, Zhejiang Normal University 1 , 1108 Gengwen Road, Hangzhou 311231, Zhejiang Province,","place":["People\u2019s Republic of China"]},{"name":"State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 2 , 457 Zhongshan Road, Dalian 116023, Liaoning Province,","place":["People\u2019s Republic of China"]},{"name":"Department of Chemistry, College of Science, Southern University of Science and Technology 3 , 1088 Xueyuan Road, Shenzhen 518055,","place":["People\u2019s Republic of China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3040-1481","authenticated-orcid":false,"given":"Shengrui","family":"Yu","sequence":"additional","affiliation":[{"name":"Hangzhou Institute of Advanced Studies, Zhejiang Normal University 1 , 1108 Gengwen Road, Hangzhou 311231, Zhejiang Province,","place":["People\u2019s Republic of China"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"317","published-online":{"date-parts":[[2026,3,4]]},"reference":[{"key":"2026030406415031900_c1","doi-asserted-by":"publisher","first-page":"3609","DOI":"10.1021\/j100263a008","volume":"89","year":"1985","journal-title":"J.\u00a0Phys. 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