CH 3 D photomixing spectroscopy up to 2.5 THz: New set of rotational and dipole parameters, first THz self-broadening measurements
Journal of Quantitative Spectroscopy and Radiative Transfer, ISSN: 0022-4073, Vol: 189, Page: 198-205
2017
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Article Description
Several previously unmeasured transitions of 12 CH 3 D have been recorded by a terahertz photomixing continuous-wave spectrometer up to Q R (10) branch at 2.5 THz. An improved set of rotational constants has been obtained utilizing a THz frequency metrology based on a frequency comb that achieved an averaged frequency position better than 150 kHz on more than fifty ground-state transitions. A detailed analysis of the measured line intensities was undertaken using the multispectrum fitting program and has resulted in a determination of new dipole moment parameters. Measurements at different pressures of the Q R (7) transitions provide the first determination of self-broadening coefficients from pure rotational CH 3 D lines. The THz rotational measurements are consistent with IR rovibrational data but no significant vibrational dependence of self-broadening coefficient may be observed by comparison.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0022407316306719; http://dx.doi.org/10.1016/j.jqsrt.2016.11.011; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85002376246&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0022407316306719; https://api.elsevier.com/content/article/PII:S0022407316306719?httpAccept=text/xml; https://api.elsevier.com/content/article/PII:S0022407316306719?httpAccept=text/plain; https://dul.usage.elsevier.com/doi/; https://dx.doi.org/10.1016/j.jqsrt.2016.11.011
Elsevier BV
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