The first Townsend ionization coefficient αp₀ (cm×Torr)^-1 has been experimentally determined for an Ep₀ (volts/cm×{}Torr) range from 3 to 300 in cataphoretically cleaned helium. The results obtained have been compared with several experimental and theoretical determinations of αp₀. The present values are in agreement within the combined experimental errors with those of Davies, Jones, and Morgan. Comparison is also made with the experimental results of Townsend and MacCallum where good agreement is found except at their lowest Ep₀ values, where the present results lie below their corresponding data. At low Ep₀, the present results agree reasonably well with the theoretical values of Phelps and Dunlop except at very low Ep₀ where Dunlop's calculated values are considerably smaller than the present experimental results. The significance of the experimental method at very high Ep₀ where equilibrium conditions do not prevail is also discussed.
No takes yet. Share an insight, caveat, or question.
Chanin et al. (1964) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: