Measurements on Dielectric Constants and Dipole Moments of Gases by Means of Microwave at 9400 Megacycles

The dielectric constants and dipole moments of several gases (i.e. oxygen, dry air, water vapor, ozone, difluorodichloromethane and monochloro- trifluoromethane) have been determined by a microwave method, using comparison to a gas of known dielectric constant. Accuracy of about 2 % has been obtained for the dielectric constant and 6 % for the dipole moment. The method is discussed from theoretical and practical points of view, possible improvements are pointed out and its general suitability for measurements of this kind is investigated.