First high–resolution comprehensive analysis of 72GeH4 spectra in the Dyad and Pentad regions

Comprehensive study of the pentad bending triad region of germane: Positions, strengths, widths and shifts of lines in the 2ν2, ν2+Ulenikov1, Gromova2, Bekhtereva3 et al. 2021Journal of Quantitative Spectroscopy and Radiative TransferSelf Cite6000View full textAdd to dashboardCite

“…The values of all 16422 transitions (including "hot" transitions)obtained in the present study (see Section 3) and taken from [1] - [3] were used as the initial experimental data in the fit procedure. High order centrifugal distortion, tetrahedral splitting and resonance interaction parameters which have been obtained in [1] - [3] from the large amount of experimental data for the 76 GeH 4 , 73 GeH 4 and 72 GeH 4 isotopologues were constrained to the values of corresponding parameters from [1] - [3] for all five isotopologues and were not varied during the fit. Such parameters are presented in (parameters both from Table 3 and Table 4 can be directly used in the Dijon STDS code).…”

“…This work is a continuation of the recent high-resolution study of different isotopologues of the germane molecule [1] - [3]. Knowledge of spectroscopic characteristics of different isotopologues of germane is important in many fields of science and technology, such as high purity semi-conductor manufacturing, [4] - [5], chemical physics and astrophysics, [6] - [11], etc.…”

“…Earlier high resolution spectra of germane have been studied in many laboratory investigations ([17]- [31] and references therein; see also recent quantitative study of line positions and strengths of the Dijon group, [32], with the resulting line lists included in the VAMDC/GeCaSDa database [33] and to be also inserted in the next HITRAN update, as a new molecule for this database). As to the spectral region considered in the present study, line positions in the 2ν 2 , ν 2 + ν 4 and 2ν 4 bands were discussed earlier in [1] - [3] where specially enriched 76 GeH 4 [1], 73 GeH 4 [2] and 72 GeH 4 [3] species have been analysed. In this case, line positions of the discussed absorption bands of 70 GeH 4 and 74 GeH 4 were not discussed earlier (in [1] the ro-vibrational structure of the (0101, F 1 ) and (0101, F 2 ) vibrational states was obtained from "hot" transitions).…”

“…Parameters presented without confidence intervals were constrained to the values of corresponding parameters of the 76 GeH4, 73 GeH4, or 72 GeH4 isotopologues from Refs [1]. [2], or[3]. Parameters of 70 GeH4 and 73 GeH4 which are marked by star were obtained from interpolation/extrapolation of the values of corresponding parameters of the three other species and were not varied in the fit.…”

“…Assignment of transitions of the 70 GeH 4 , 72 GeH 4 and 74 GeH 4 species Joint ro-vibrational analysis of the pentad bending triad of five, 70 GeH 4 , 72 GeH 4 , 73 GeH 4 , 74 GeH 4 , and 76 GeH 4 isotopologues of germane The information on 6873 transitions obtained in the present study and discussed in Section 3 was added to the known information about the pentad bending triad and "hot" transitions of 72 GeH 4 , 73 GeH 4 , 74 GeH 4 , and 76 GeH 4 from Refs. [1] -[3] …”