
TY  - JOUR
A1  - Crompton, RW 
A1  - McIntosh, AI 
T1  - Electron Drift and Diffusion in Parahydrogen at 77°K
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1968
VL  - 21
IS  - 5
SP  - 637
EP  - 648
KW  - 
UR  - https://doi.org/10.1071/PH680637 
N2  - This paper reports a series of experiments to measure electron diffusion and drift in pure parahydrogen at 77&#176;&#160;K. Tables of data are given for the electron drift velocity W in the range 1.2 X l0&#8722;19 &#8804; E/N &#8804; 9.5 x l0&#8722;17 V cm2 and for the ratio of diffusion coefficient to mobility D/&#956; for 2 X 10&#8722;20 &#8804; E/N &#8804; 6 X 10&#8722;17 V cm2. As expected, these data are indistinguishable from the data for normal hydrogen in the thermal region and at the higher values of E/N where vibrational excitation is the dominant process controlling the electron energy distribution. However, at intermediate values of E/N, the values of W and D/&#956; differ by more than 10 and 20% respectively from the corresponding values in normal hydrogen, demonstrating the influence of the difference in the statistical weights of the rotational levels in the two gases. 
ER  -

