Transferring the high accuracy of the 10μm CO2 laser bands to far infrared region with internal calibration of CS2

FTFIR-spectrum of the ground state of D2CO

“…The wavenumber precision in the region over 200 cm À1 would have been degraded by the calibration. On the other hand, the accuracy given for the D 2 CO lines in [2] is in the same order as the absolute accuracy of the new water lines [6]. The other advantage of these water lines is that they are lying in the upper region of the measured spectrum.…”

“…It has a form Dk = Dm ref /m cal + Dk std , where Dm ref = 30 · 10 À6 cm À1 is the mean accuracy of the lines in the calibration source [6], m cal is the average position of calibration lines in the present measurement, and Dk std = 1.234 · 10 À7 is the 1) is the uncertainty to determine the line position in the spectrum. According to this the accuracy of the used lines is varying from 20 to 170 · 10 À6 cm À1 .…”

High-resolution infrared spectroscopy with synchrotron sources

“…This beamline has enjoyed a very productive history over the past 15 years [11][12][13][14][15][16][17][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44] , achieving a remarkable standard deviation of just 0.00010 cm À1 for some 1900 fitted transitions. The first figure of this paper is reproduced here as Fig.…”

“…1. Propyne continued as the subject of further papers based on MAX-lab spectra [17,31,44], and the excellent wavenumber precision which was possible in the far-IR region was utilized, together with non-SR results from other labs, to establish improved wavenumber standards based on CO 2 ,C S 2 , and H 2 O [35,36].…”

Transferring calibration from CO2 laser lines to far infrared water lines with the aid of the ν2 band of OCS and the ν2, ν1−ν2, and ν1+ν2 bands of 13CS2: Molecular constants of 13CS2

“…Recently, the high accuracy of the carbon dioxide (CO 2 ) laser bands around 10 lm [1] was transferred to the far infrared region from 230 to 480 cm À1 with the rotation vibration bands of carbon disulfide ( 12 CS 2 ) [2]. The bands 3m 2 and m 1 + m 2 were compared to laser lines.…”