Perturber m m_a(Da) m_p(Da) d_a(pm) d_p(pm) HWHH(cm-1 atm-1)_296K T_min(K) SiC 4 40.98 39.98 488 488 0.1096 * 53 Ar 10 40.98 39.96 488 333 0.0485 * 80 CH4 10 40.98 16.03 488 380 0.0718 * 86 CO 4 40.98 27.99 488 376 0.0947 * 73 CO2 6 40.98 43.99 488 330 0.0564 * 103 H2 6 40.98 2.02 488 292 0.1704 * 43 H2O 4 40.98 18.01 488 265 0.0830 * 110 He 10 40.98 4.00 488 258 0.0943 * 23 N2 6 40.98 28.01 488 368 0.0697 * 67 NH3 4 40.98 17.03 488 260 0.0835 * 98 NO 4 40.98 30.00 488 317 0.0806 * 83 O2 6 40.98 31.99 488 346 0.0637 * 76