Measurement and assignment of new FIR laser lines in12CH3OH and13CH3OH

Pereira, D.; Scalabrin, A.

doi:10.1007/bf00693987

Cited by 26 publications

(6 citation statements)

References 14 publications

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“…The wave number calculated from our parameters in Table II for the ͑125,Jϭ22→21͒ CO transition is 34.042 cm Ϫ1 , and although a single a-type line is a slim basis for an assignment the IR pump transition is well resolved while the ͑125͒ CO subband is definitively identified through the localized perturbation mentioned in Sec. IV D. Several other proposed nϭ1 FIR laser system assignments 33 based on energies calculated without knowledge of the nϭ1 downshifts are inconsistent with our spectroscopic results.…”

Section: Comments On Torsionally Excited Fir Laser Assignmentscontrasting

confidence: 99%

“…[3][4]12,33 We have identified the IR pump for the 64.70 and 269.9 m laser lines as the P͑124,25͒ CO transition in the scheme shown in Fig. 4 The self-consistency among wave numbers from independent combinations is well within the experimental uncertainty, and the mean wave numbers Laϭ37.1219 and Lb ϭ154.8250 cm Ϫ1 are in acceptable agreement with the observed values of 37.05 and 154.6 cm Ϫ1 derived from the reported wavelengths.…”

Section: Comments On Torsionally Excited Fir Laser Assignmentssupporting

confidence: 67%

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Fourier transform spectroscopy of torsionally excited C-13 methanol in the CO-stretching band

Lees

Mukhopadhyay

Predoi

et al. 1996

The Journal of Chemical Physics

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Articles you may be interested inGround and asymmetric CO-stretch excited state tunneling splittings in the formic acid dimer Torsionally excited nϭ1 and nϭ2 subbands of the CO-stretching fundamental have been assigned in the Fourier transform infrared spectrum of 13 CH 3 OH recorded at a resolution of 0.002 cm Ϫ1 . For the nϭ1 torsional state, subbands with K values up to 7 have been identified for A torsional symmetry and up to 5 for E symmetry. For nϭ2, four subbands have so far been assigned. Subband origins have been obtained by fitting the observed wave numbers to J(Jϩ1) power-series expansions. The expansion parameters represent the data compactly to close to the experimental uncertainty in the absence of line blending or perturbations. Significant downshifting of the nϭ1 origins is observed, correlated closely with proximity to the nϭ0 OH-bending state. J-localized perturbations have been observed and characterized for several subbands. Two of the far-infrared laser lines optically pumped by the 10R͑14͒ CO 2 laser line have been assigned.

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Section: Comments On Torsionally Excited Fir Laser Assignmentscontrasting

confidence: 99%

Section: Comments On Torsionally Excited Fir Laser Assignmentssupporting

confidence: 67%

Fourier transform spectroscopy of torsionally excited C-13 methanol in the CO-stretching band

Lees

Mukhopadhyay

Predoi

et al. 1996

The Journal of Chemical Physics

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“…The pump transition for the 25.5 cm Ϫ1 FIRL line in the second 9SR(9) system, speculated earlier (35) to be a Q (16) ri line, is now assigned instead as R(0 4 1,4,15) oh . This nominally forbidden ⌬n ϭ 1, ⌬K ϭ 0 transition is induced through strong anharmonic coupling between n ϭ 0 OHbending and n ϭ 1 CH 3 -rocking modes (11).…”

Section: Sr(9) and 9sp(13)mentioning

confidence: 99%

On the Assignment of Optically Pumped Far-Infrared Laser Emission from CH3OH

Lees

1999

Journal of Molecular Spectroscopy

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“…Line 5 (40.14 cm À1 ) was first reported in Ref. [18] with a perpendicular polarization, and it was assigned by Predoi et al [12] as a transition to jri; 0; 2; 14; Ei (calculated: 40.229 cm À1 ), which implied a parallel polarization. We have remeasured the polarization of this line, and found that it is parallel, in agreement with the assignment.…”

Section: Methodsmentioning

confidence: 98%