
TY  - JOUR
A1  - IH Hall, Barbara 
T1  - The Diffusion of Electrons in a Gas at Low Temperatures
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1955
VL  - 8
IS  - 4
SP  - 551
EP  - 554
KW  - 
UR  - https://doi.org/10.1071/PH550551 
N2  - In the absence of an electric field, the state of motion of electrons moving freely among molecules of a gas is one in which the mean energy of agitation Q of an electron is the same as that, Q0, of a molecule of the gas. It is known, however, that in the presence of an applied uniform electric field Z the steady state of motion is one in which Q exceed's Q0, and, for a constant gas temperature, Q is a function of Z/n where n is the number of gas molecules in unit volume. Usually the measurements are made at room temperature, generally taken as 288°K, and it is convenient to replace Z/n by Z/p where p is the pressure of the gas in millimetres of mercury. It is of interest, however (Crompton, Huxley, and Sutton 1953), to investigate how the dependence of Q upon Z/n is influenced by the temperature of the gas itself, that is to say, by Q0. If the dependence of Q upon both Z/n and Q0 be expressed by some formula Q = f(Z/n, Q0), then all that is known with certainty about the function f is that when Z/n = 0, Q = Q0. In view of the absence of any theoretical guidance concerning the dependence of Q upon both Z/n = 0 and Q0, it was decided to investigate the matter experimentally in two simple diatomic gases, nitrogen and hydrogen. 
ER  -

