DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, KS | ko |
dc.contributor.author | Lim, JS | ko |
dc.contributor.author | Ahn, DS | ko |
dc.contributor.author | Choi, KW | ko |
dc.contributor.author | Kim, Sangkyu | ko |
dc.contributor.author | Choi, YS | ko |
dc.date.accessioned | 2009-12-08T01:26:49Z | - |
dc.date.available | 2009-12-08T01:26:49Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2006-03 | - |
dc.identifier.citation | JOURNAL OF CHEMICAL PHYSICS, v.124, no.12, pp.65 - 70 | - |
dc.identifier.issn | 0021-9606 | - |
dc.identifier.uri | http://hdl.handle.net/10203/14349 | - |
dc.description.abstract | Photodissociation dynamics of iodoacetonitrile (ICH2CN) have been investigated at pump wavelengths of 266 and 304 nm using a photofragment ion image velocity mapping technique. At both wavelengths, the prompt C-I bond rupture takes place on the repulsive excited states to give I(P-2(3/2)) and I-*(P-2(1/2)), and their speed and spatial distributions are simultaneously measured. The recoil anisotropy parameter (beta) at 266 nm is determined to be 1.10 and 1.60 for I and I-*, respectively, while it is found to be much higher at 304 nm to give beta=1.70 and 1.90 for I and I-*, respectively. The branching ratios for I-*/I channels are measured to be 0.724 and 0.136 at 266 and 304 nm, respectively, giving insights on nonadiabatic transition phenomena and relative oscillator strengths of optically accessible transitions of ICH2CN. Accordingly, relative oscillator strengths of parallel/perpendicular transitions and nonadiabatic transitions among the excited states are quantitatively characterized. A large portion of the available energy (41%-48%) goes into the internal energy of the CH2CN fragment. A modified impulsive model in which the CH2CN fragment is assumed to be rigid predicts the energy disposal quite well. Delocalization of an unpaired electron of the CH2CN radical during the C-I bond cleavage, leading to a large structural change of the CH2CN moiety, may be responsible for internally hot fragments. (c) 2006 American Institute of Physics. | - |
dc.description.sponsorship | The authors sincerely thank Dr. David Parker University of Nijmegen, Germany, Dr. Hanna Reisler University of Southern California at Los Angeles, Dr. Arthur Suits Wayne State University, and Dr. Toshi Suzuki RIKEN, Japan for kindly providing us with image reconstruction programs. The authors gratefully acknowledge support from the Grants for Pure Basic Science Research Groups of Korea Research Foundation KRF-2005-070-C00063 and the Shared Research Equipment Assistant Program of the Korea Basic Science Institute. | en |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | AMER INST PHYSICS | - |
dc.subject | ENHANCED MULTIPHOTON IONIZATION | - |
dc.subject | TRIATOMIC PHOTOFRAGMENT SPECTRA | - |
dc.subject | METHYL-IODIDE | - |
dc.subject | ALKYL IODIDES | - |
dc.subject | MOLECULAR-OXYGEN | - |
dc.subject | ATOMIC IODINE | - |
dc.subject | UMBRELLA MODE | - |
dc.subject | CH3I | - |
dc.subject | BAND | - |
dc.subject | PHOTOELECTRON | - |
dc.title | Nonadiabatic dynamics in the photodissociation of ICH2CN at 266 and 304 nm studied by the velocity map imaging | - |
dc.type | Article | - |
dc.identifier.wosid | 000236464000021 | - |
dc.identifier.scopusid | 2-s2.0-34447581338 | - |
dc.type.rims | ART | - |
dc.citation.volume | 124 | - |
dc.citation.issue | 12 | - |
dc.citation.beginningpage | 65 | - |
dc.citation.endingpage | 70 | - |
dc.citation.publicationname | JOURNAL OF CHEMICAL PHYSICS | - |
dc.identifier.doi | 10.1063/1.2167748 | - |
dc.contributor.localauthor | Kim, Sangkyu | - |
dc.contributor.nonIdAuthor | Lee, KS | - |
dc.contributor.nonIdAuthor | Lim, JS | - |
dc.contributor.nonIdAuthor | Ahn, DS | - |
dc.contributor.nonIdAuthor | Choi, KW | - |
dc.contributor.nonIdAuthor | Choi, YS | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | ENHANCED MULTIPHOTON IONIZATION | - |
dc.subject.keywordPlus | TRIATOMIC PHOTOFRAGMENT SPECTRA | - |
dc.subject.keywordPlus | METHYL-IODIDE | - |
dc.subject.keywordPlus | ALKYL IODIDES | - |
dc.subject.keywordPlus | MOLECULAR-OXYGEN | - |
dc.subject.keywordPlus | ATOMIC IODINE | - |
dc.subject.keywordPlus | UMBRELLA MODE | - |
dc.subject.keywordPlus | CH3I | - |
dc.subject.keywordPlus | BAND | - |
dc.subject.keywordPlus | PHOTOELECTRON | - |
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