Double resonant absorption measurement of acetylene symmetric vibrational states probed with cavity ring down spectroscopy

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dc.contributor University of Helsinki, Department of Chemistry en
dc.contributor University of Helsinki, Department of Chemistry en
dc.contributor University of Helsinki, Department of Chemistry en
dc.contributor University of Helsinki, Department of Chemistry en
dc.contributor.author Karhu, Juho
dc.contributor.author Nauta, Janko
dc.contributor.author Vainio, Markku Mikael
dc.contributor.author Metsälä, Markus Ilari
dc.contributor.author Hoekstra, Steven
dc.contributor.author Halonen, Lauri Olavi
dc.date.accessioned 2016-08-10T11:48:01Z
dc.date.available 2016-08-10T11:48:01Z
dc.date.issued 2016-06-22
dc.identifier.citation Karhu , J , Nauta , J , Vainio , M M , Metsälä , M I , Hoekstra , S & Halonen , L O 2016 , ' Double resonant absorption measurement of acetylene symmetric vibrational states probed with cavity ring down spectroscopy ' , Journal of Chemical Physics , vol. 144 , no. 24 . https://doi.org/10.1063/1.4954159 en
dc.identifier.issn 0021-9606
dc.identifier.other PURE: 66218414
dc.identifier.other PURE UUID: a342b53c-86e3-48fc-8a48-bd04858c0003
dc.identifier.other Scopus: 84976443403
dc.identifier.other WOS: 000379166100020
dc.identifier.other ORCID: /0000-0002-0716-7132/work/44019059
dc.identifier.other ORCID: /0000-0002-0095-6163/work/31037625
dc.identifier.other ORCID: /0000-0002-9962-3827/work/31674474
dc.identifier.uri http://hdl.handle.net/10138/165532
dc.description.abstract A novel mid-infrared/near-infrared double resonant absorption setup for studying infrared-inactive vibrational states is presented. A strong vibrational transition in the mid-infrared region is excited using an idler beam from a singly resonant continuous-wave optical parametric oscillator, to populate an intermediate vibrational state. High output power of the optical parametric oscillator and the strength of the mid-infrared transition result in efficient population transfer to the intermediate state, which allows measuring secondary transitions from this state with a high signal-to-noise ratio. A secondary, near-infrared transition from the intermediate state is probed using cavity ring-down spectroscopy, which provides high sensitivity in this wavelength region. Due to the narrow linewidths of the excitation sources, the rovibrational lines of the secondary transition are measured with sub-Doppler resolution. The setup is used to access a previously unreported symmetric vibrational state of acetylene, nu(1) + nu(2) + nu(3) + nu(1)(4) + nu(-1)(5) in the normal mode notation. Single-photon transitions to this state from the vibrational ground state are forbidden. Ten lines of the newly measured state are observed and fitted with the linear least-squares method to extract the band parameters. The vibrational term value was measured to be at 9775.0018(45) cm(-1), the rotational parameter B was 1.162 222(37) cm(-1), and the quartic centrifugal distortion parameter D was 3.998(62) x 10(-6) cm(-1), where the numbers in the parenthesis are one-standard errors in the least significant digits. Published by AIP Publishing. en
dc.format.extent 7
dc.language.iso eng
dc.relation.ispartof Journal of Chemical Physics
dc.rights en
dc.subject 116 Chemical sciences en
dc.subject SPECTROSCOPY en
dc.subject Spectroscopy, infrared en
dc.subject Spectroscopy, high-resolution en
dc.title Double resonant absorption measurement of acetylene symmetric vibrational states probed with cavity ring down spectroscopy en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1063/1.4954159
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/acceptedVersion
dc.contributor.pbl
dc.contributor.pbl

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