Infrared spectrum of isotopic carbon dioxide in the region of bending fundamental ν2

Near infrared spectroscopy of carbon dioxide. II: 16O13C16O and 16O13C18O line positions

“…There is very good overall agreement between the various studies. The parameter uncertainties demonstrate Table 4 Comparison of low-lying 16 that the precision of the laser band measurements have been effectively transferred to B 00001 , D 00001 , and H 00001 through the primary energy level loops in the present analysis and that these values are similar to those reported in R92, Guelachvili [33], Bailly and Rossetti [26], and Jolma [27]. Octic distortion constants (L m ) were required to fit the 10001, 10002, and 00011 states, but L 00001 could not be significantly determined and was omitted.…”

“…The reasons for the P state discrepancies are unclear, especially given the good agreement between our values and those Jolma [27] determined from the 16 lm spectrum. Table 3 Comparison of low-lying 16 Table 3 compares the rotational and distortion constants determined in this work for several low-lying R states with those from previous studies [14,23,26,27,33,34]. The parameters and 1r uncertainties presented in this table and subsequent comparison tables occasionally include more digits than are physically justified by the uncertainties; the extra digits are reported for numerical precision of the fitting results.…”

“…Since the transitions 10001 ‹ 00001 and 10002 ‹ 00001 are symmetry forbidden, the primary energy level loops must go through the 01101 state. Jolma [27] provided accurate positions for the 01101 ‹ 00001, 10001 ‹ 01101 and 10002 ‹ 01101 bands. The primary loops are preferred for determining the 00001 state constants due to the high quality of both the 01101 ‹ 00001 [27] and 00011 fi 00001 [26] data sets.…”

“…The constants given in Table 1 for the 00001, 10002, 10001, 00011, 01101, 11101, and 01111 vibrational states were determined by fitting 556 transitions that combined the laser [23][24][25]28] and infrared [26,27] measurements. The 00011 fi 10002 and 00011 fi 10001 laser band frequencies reported by Maki et al [23] were included for transitions up to J 0 = 67 and assigned the uncertainties tabulated in [23], typically <7 · 10 À7 cm À1 (20 kHz).…”

“…The 00011 fi 00001 infrared emission spectra recorded by Bailly and Rossetti [26] sampled transitions up to J 0 = 69 and were assigned uncertainties of 2.4 · 10 À5 cm À1 while the 01111 fi 01101 transitions sampled up to J 0 = 55 and were assigned uncertainties of 3 · 10 À5 cm À1 . The 01101 ‹ 00001 transitions reported by Jolma [27] sampled up to J 0 = 73 and were assigned uncertainties of 4 · 10 À5 cm À1 . The 10002 ‹ 01101 hot band transitions sampled up to J 0 = 53 and were assigned uncertainties of 5 · 10 À5 cm À1 .…”