A discussion of the motion in nitrogen of free electrons with small energies with reference to the ionosphere

摘要: Abstract In this paper measurements of diifusion and drift slow electrons in pure nitrogen carried out by Crompton Hall are discussed. The discussion is restricted to the range energies between that thermal equilibrium four times value. From behaviour coefficient diffusion D it concluded elastic collisions molecules collisional cross-section A proportional speed c electron; namely, = 3·29 × 10 −23 cm 2 . result an accurate expression derivable for velocity W terms parameter Z p mean energy agitation electrons. measured rate w at which with Q lose accurately described a formula ascribes these losses chiefly excitation changes rotational states molecules. close agreement derived dependence upon significance ionospheric studies considered particular reference interpretation radio-wave interaction. It shown values molecular concentration height 82 90 km above ground, found means interaction, consistent A.R.D.C. model atmosphere ( Minzner Ripley , 1956).