He-, Ne- and Kr-broadening coefficients of lines in the fundamental ν₃ band of ¹²C³²S₂ at low temperature

Using a tunable diode-laser spectrometer coupled with a low temperature cell, He-, Ne- and Kr-broadening coefficients of 8 lines in the fundamental ν₃ band of CS₂ have been measured at five low temperatures: 173 K, 198 K, 223 K, 248 K and 273 K. These lines with J values ranging from 2 to 78 are located in the spectral range 1514-1544 cm ^-1, four lines in the P branch and four in the R branch. The collisional half-widths have been obtained by adjusting each experimental profile with a Voigt, Rautian and Galatry lineshape model. For each line, the collisional broadening coefficients obtained at low temperature and those previously at room temperature have been used to deduce the n-parameter of the temperature dependence. We have also determined the average value of the temperature dependence of collisional broadening coefficients for lines in the ν₃ band of CS₂ diluted in helium, neon and krypton.