Line intensities of CH3D in the Triad region: 6–10 μm

Line intensities of the three lowest fundamentals of the 12CH3D Triad are modeled with an RMS of 3.2% using over 2100 observed values retrieved by multispectrum fitting of enriched sample spectra recorded with two Fourier transform spectrometers. The band strengths of the Triad in units of 10-18 cm-1/(molecule cm-2) at 296 K are, respectively, 2.33 for <f>ν6</f> <f>(E)</f> at 1161 cm-1, 1.75 for <f>ν3</f> <f>(A1)</f> at 1307 cm-1 and 0.571 for <f>ν5</f> <f>(E)</f> at 1472 cm-1. The total calculated absorption arising from 12CH3D Triad fundamentals is 4.65×10-18 cm-1/(molecule cm-2) at 296 K. In addition, some 740 intensities of nine hotbands are fitted to 8.1%; most of the hotband measurements belong to <f>2ν6-ν6</f> and <f>ν3+ν6-ν3</f> near 1160 cm-1, <f>2ν3-ν3</f> near 1290 cm-1 and <f>ν3+ν6-ν6</f> near 1304 cm-1. The other observed hotbands are <f>ν5+ν6-ν6,</f> <f>2ν5-ν5,</f> <f>ν5+ν6-ν5,</f> <f>ν3+ν5-ν3,</f> and ν3+ν5-ν5. [Copyright &y& Elsevier]