J/ApJS/166/650ivo://CDS.VizieR/J/ApJS/166/650doi:10.26093/cds/vizier.21660650CDSMaeda A.Medvedev I.R.De Lucia F.C.Herbst E.2008-07-29T17:03:38Z2008-07-29T17:01:07ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fratomic-physicsIso-propanol [(CH_3_)_2_CHOH], an isomer of n-propanol, has been studied in the millimeter- and submillimeter-wave region of the electromagnetic spectrum with our FASSST spectrometer through 360GHz. Spectra arising from the ground vibrational state of all three hydroxyl torsional substates, given the labels symmetric gauche, antisymmetric gauche, and trans in order of increasing energy, have been observed. We have successfully assigned ~7600 pure rotational transitions within the torsional substates as well as ~4700 torsional-rotational transitions between the symmetric and antisymmetric gauche substates through the lower rotational quantum number J"=68. Spectral lines involving one or both of the two gauche forms have been simultaneously analyzed with a 2x2 effective torsional-rotational Hamiltonian, which includes terms through fifth order in the torsional-rotational interaction. Excluding perturbed transitions, the assigned transitions were fitted to a root mean square deviation of 76kHz. The trans substate was analyzed as a semirigid rotor, and its unperturbed transitions fitted to a root mean square deviation of 63kHz. A perturbation was seen at transitions with J">50 in the trans substate. The torsional excitation energy for the trans substate above ground was estimated from intensity ratios to be about 120K.2006ApJS..166..650Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/166/650CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/166/650https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/166/650http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/166/650https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/166/650https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/166/650http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/166/650GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJS/166/650/table1Rotational-torsional transition frequencies for iso-propanol in its ground vibrational statesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'The upper J quantum numberinstr.det.qe;stat.maxintKa'The upper Ka quantum numberphys.atmol.qnintKc'The upper Kc quantum numberphys.atmol.qnintsigma'The upper torsional state (1)phys.atmol.qnintJ"The lower J quantum numberinstr.det.qe;stat.minintKa"The lower Ka quantum numberphys.atmol.qnintKc"The lower Kc quantum numberphys.atmol.qnintsigma"The lower torsional state (1)phys.atmol.qnintFreqThe experimental frequency of the transitionMHzem.freq;phys.atmol.transitiondoubleO-CThe observed minus calculated valueMHzem.freqfloatCommAdditional comments (2)meta.notecharJ/ApJS/166/650/table4Predicted rotational-torsional transition frequencies for iso-propanol in its ground vibrational staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'The upper J quantum numberinstr.det.qe;stat.maxintKa'The upper Ka quantum numberphys.atmol.qnintKc'The upper Kc quantum numberphys.atmol.qnintsigma'[0/2] The upper torsional statephys.atmol.qnintJ"The lower J quantum numberinstr.det.qe;stat.minintKa"The lower Ka quantum numberphys.atmol.qnintKc"The lower Kc quantum numberphys.atmol.qnintsigma"[0/2] The lower torsional statephys.atmol.qnintFreqThe frequency of the transitionMHzem.freq;phys.atmol.transitiondoublee_FreqEstimated uncertainty in FreqMHzstat.errorfloatLineStrLine strength times {mu}G^2^ (1)D**2phys.atmolfloatGDipole moment component label (2)phys.mol.dipolecharEupper/KUpper state energyKphys.energy;phys.atmol.levelfloat