Ultraslow molecules

Saturation spectroscopy with selection of ultraslow molecules is a unique method for studying rotational-vibrational transitions in polyatomic molecules, with a spectral resolution of Av/vq = 10 -10 . A spectral resolution as high as this is necessary in investigations into the fundamental effect of parity violation in chiral molecules. 

Experiments described in this section are suited to investigate ultraslow motion with correlation times in the millisecond-to-second range. Here, the NMR spectra are given by their rigid-lattice limit and one correlates the probability to find given NMR frequencies at two different times separated by the so-called mixing time tm [11,72]. A two-dimensional (2D) spectrum results, being a function of two NMR frequencies at t = 0 and t = tm, respectively. Since the NMR frequency reflects the orientation of the molecule, 2D spectra provide a visual representation of the reorientational process. Time- and frequency-domain... 

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