New acetylene line list near 3.8-m - Part III-¹²C¹³CH₂ and ¹²C₂HD

The intensities of minor acetylene isotopologues (CCH2)-C-12-C-13 and (C2HD)-C-12 have been studied from Fourier transform spectra of acetylene in natural abundance using high optical path length. This study completes the work performed in the two first paper of the series (JQSRT 2023;295:108,413 and JQSRT 2023;311:108,771) where 71 bands of (C2H2)-C-12 were studied in the Delta P = 4 spectral region (similar to 2400-2900 cm(-1)). In this work, 692 measured line intensities allowed to derive vibrational transition dipole moment squared (and sometimes Herman-Wallis coefficients) for 11 bands of (CCH2)-C-12-C-13 and 6 bands of (C2HD)-C-12. Using line positions and broadening parameters from literature, a line list has been generated for atmospheric and astrophysical applications.