dc.contributor.author | Changala, P. Bryan | |
dc.contributor.author | Baraban, Joshua H. | |
dc.contributor.author | Merer, Anthony J. | |
dc.contributor.author | Field, Robert W. | |
dc.contributor.author | Baraban, Joshua Herschel | |
dc.contributor.author | Field, Robert W | |
dc.date.accessioned | 2017-01-31T15:11:31Z | |
dc.date.available | 2017-01-31T15:11:31Z | |
dc.date.issued | 2015-08 | |
dc.date.submitted | 2015-07 | |
dc.identifier.issn | 0021-9606 | |
dc.identifier.issn | 1089-7690 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/106799 | |
dc.description.abstract | We report novel experimental strategies that should prove instrumental in extending the vibrational and rotational assignments of the S1 state of acetylene, C[subscript 2]H[subscript 2], in the region of the cis-trans isomerization barrier. At present, the assignments are essentially complete up to ∼500 cm[superscript −1] below the barrier. Two difficulties arise when the assignments are continued to higher energies. One is that predissociation into C[subscript 2]H + H sets in roughly 1100 cm[superscript −1] below the barrier; the resulting quenching of laser-induced fluorescence (LIF) reduces its value for recording spectra in this region. The other difficulty is that tunneling through the barrier causes a staggering in the K-rotational structure of isomerizing vibrational levels. The assignment of these levels requires data for K values up to at least 3. Given the rotational selection rule K' − ℓ" = ± 1, such data must be obtained via excited vibrational levels of the ground state with ℓ" > 0. In this paper, high resolution H-atom resonance-enhanced multiphoton ionization spectra are demonstrated to contain predissociated bands which are almost invisible in LIF spectra, while preliminary data using a hyperthermal pulsed nozzle show that ℓ" = 2 states can be selectively populated in a jet, giving access to K' = 3 states in IR-UV double resonance. | en_US |
dc.description.sponsorship | United States. Department of Energy (Grant No. DE-FG0287ER13671) | en_US |
dc.description.sponsorship | Chinese Academy of Sciences (Distinguished Visiting Professorship) | en_US |
dc.description.sponsorship | Natural Sciences and Engineering Research Council of Canada (NSERC) | en_US |
dc.language.iso | en_US | |
dc.publisher | American Institute of Physics (AIP) | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1063/1.4929588 | en_US |
dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
dc.source | Prof. Field via Erja Kajosalo | en_US |
dc.title | Probing cis-trans isomerization in the S1 state of C2H2 via H-atom action and hot band-pumped IR-UV double resonance spectroscopies | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Changala, P. Bryan, Joshua H. Baraban, Anthony J. Merer, and Robert W. Field. “Probing Cis-Trans Isomerization in the S1 State of C2H2 via H-Atom Action and Hot Band-Pumped IR-UV Double Resonance Spectroscopies.” J. Chem. Phys. 143, no. 8 (August 28, 2015): 084310. © 2015 AIP Publishing LLC. | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Chemistry | en_US |
dc.contributor.approver | Field, Robert W | en_US |
dc.contributor.mitauthor | Changala, P. Bryan | |
dc.contributor.mitauthor | Baraban, Joshua Herschel | |
dc.contributor.mitauthor | Field, Robert W | |
dc.relation.journal | Journal of Chemical Physics | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Changala, P. Bryan; Baraban, Joshua H.; Merer, Anthony J.; Field, Robert W. | en_US |
dspace.embargo.terms | N | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-7609-4205 | |
mit.license | PUBLISHER_POLICY | en_US |