Line positions and energy levels of the 18O substitutions from the HDO/D2O spectra between 5600 and 8800cm−1

Abstract

Abstract

Analysis of an 18O and D enhanced water spectrum and new assignments for HD18O and D218O in the near-infrared region (6000–7000cm−1) using newly calculated variational line lists

“…The previous work of Ormsby et al [26] in this region assigns all the D 2 16 O transitions observed here, however for D 2 18 O 174 new assignments were made to complement the work of Mikhailenko et al [25].…”

“…[27]. Upper labels could then be found by comparison with the published levels of Mikhailenko et al [25] in many cases. …”

“…The IUPAC TG is yet to report on doubly deuterated water isotopologues but, in any case, these are less well characterised spectroscopically than the other species considered here. However some as yet unpublished D 2 16 O features and around 300 D 2 18 O lines have been assigned in this region by the work of Mikhailenko et al [25]. Fur- This paper is structured as follows.…”

(000) and (010) energy levels of the HD18O and molecules from analysis of their ν2 bands

“…Recently, an exhaustive analysis of the H 2 18 O, H 2 17 O, HD 16 O, HD 18 O, HD 17 O, and D 2 18 O published rotation-vibrational transitions have been performed, and consistent sets of the experimental energy levels have been derived based on the Rydberg-Ritz principle [1][2][3][4]. Rare isotopic species of the water molecule, like HD 18 O, and, especially, D 2 18 O are much less investigated compared to other more abundant isotopologues.…”

“…Rare isotopic species of the water molecule, like HD 18 O, and, especially, D 2 18 O are much less investigated compared to other more abundant isotopologues. Complete list of the available studies can be found in [1,3] for HD 18 O and in [4,5] for D 2 18 O. Even for the lowest vibrational states (0 0 0) and (0 1 0), the experimental sets of rotational energy levels were limited (until recent study for D 2 18 O [5]), by J 6 16 and K a 6 10.…”