Steps Toward Experimental Detection of Molecular Parity Violation: Rovibrational Analysis of the Cf-Stretching Mode and First Overtone of CHFBrI

Details Steps Toward Experimental Detection of Molecular Parity Violation: Rovibrational Analysis of the Cf-Stretching Mode and First Overtone of CHFBrI Steps Toward Experimental Detection of Molecular Parity Violation: Rovibrational Analysis of the Cf-Stretching Mode and First Overtone of CHFBrI

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mss..confemg07a&link_type=abstract

"International Symposium On Molecular Spectroscopy, 64th Meeting, Held 22-26 June, 2009 at Ohio State University. http://molspec

Physics

Infrared/Raman

Scientific paper

The experimental detection of molecular parity violation Δ_{PV}E is of great interest because of its importance in the understanding of fundamental aspects of molecular dynamics and symmetries. One possible method for this is measuring the rovibrational or rotational frequency shifts in the infrared or microwave spectra of enantiomers. A value of 50 mHz is predicted for vibrational frequency shifts in CHFBrI, which is almost within the range of current infrared and submm wave spectroscopic resolution. We report here IR-spectroscopic results and a first high resolution analysis of the infrared spectrum of CHFBrI. The FTIR spectrum of CHFBrI was recorded at 190 K and 295 K in the regions 600-1300 cm^{-1} and 1800-2350 cm^{-1}. We were able to analyse the rovibrational spectra of CHF^{79}BrI (ν_0 = 1060.81569 cm^{-1}) and CHF^{81}BrI (ν_0 = 1060.77864 cm^{-1}) in the CF-stretching (ν_6) and its overtone regions with band centers ν_0 = 2103.75730 cm^{-1} for CHF^{79}BrI and ν_0 = 2103.65974 cm^{-1} for CHF^{81}BrI. We will discuss a possible application of CO_2 laser quasi-resonant two photon transitions in the overtone region of CHFBrI. Finally, we will show submm spectra of CHFBrI recorded with the Zürich-FASSST spectrometer and discuss how submm wave spectroscopy based on FASSST and phase-locked backward wave oscillators can be used to determine line shifts on the order of mHz.
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