Far infrared absorption in normal H2 from 77 to 298 K

Abstract The translational-rotational absorption spectrum of normal H 2 has been measured from 80 to 900 cm −1 at seven temperatures from 77.4 to 298 K. These results have been accurately fitted by a three-parameter line-shape function, thereby providing a reliable way of predicting the absorption of H 2 anywhere in this frequency and temperature region.