Perturber m m_a(Da) m_p(Da) d_a(pm) d_p(pm) HWHH(cm-1 atm-1)_296K T_min(K) KF 4 59.96 57.96 224 224 0.0190 * 326 Ar 10 59.96 39.96 224 333 0.0204 * 198 CH4 10 59.96 16.03 224 380 0.0331 * 214 CO 4 59.96 27.99 224 376 0.0426 * 181 CO2 6 59.96 43.99 224 330 0.0236 * 255 H2 6 59.96 2.02 224 292 0.0738 * 107 H2O 4 59.96 18.01 224 265 0.0332 * 274 He 10 59.96 4.00 224 258 0.0387 * 57 N2 6 59.96 28.01 224 368 0.0311 * 166 NH3 4 59.96 17.03 224 260 0.0332 * 244 NO 4 59.96 30.00 224 317 0.0338 * 206 O2 6 59.96 31.99 224 346 0.0275 * 189