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Ionization of helium by potassium positive ions

Sutton, Richard M. and Mouzon, J. Carlisle (1930) Ionization of helium by potassium positive ions. Physical Review, 35 (7). pp. 694-698. ISSN 0031-899X. http://resolver.caltech.edu/CaltechAUTHORS:SUTpr30

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Abstract

A continuation of previous attempts to ionize gases by positive ions has been extended to helium using potassium positive ions as high as 750 volts accelerating potential. At pressures between 0.01 and 0.1 mm there is definite evidence of ionization of helium above 150 or 200 volts accelerating potential. The effect is much smaller than in the gases previously reported, but it may be distinguished from the secondary emission of electrons from the metal parts under action of the positive ions. Great difficulty was encountered in changes of intensity of ionization due to impurities in the helium. Some of the uncertainties in previous work have been removed by changing the relative positions of electrodes.


Item Type:Article
Additional Information:©1930 The American Physical Society. Received 18 February 1930.
Record Number:CaltechAUTHORS:SUTpr30
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SUTpr30
Alternative URL:http://dx.doi.org/10.1103/PhysRev.35.694
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2575
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:11 Apr 2006
Last Modified:26 Dec 2012 08:49

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