Abstract
CERTAIN radioactive materials can be brought into the gas phase in a charged condition; for example, a large percentage of the products formed after the decay of the emanations and also some recoil atoms. It was thought that these ions might be suitable particles for tracing electrical or magnetic fields, especially inherent electric fields due to contact potential differences and fields of very small dimensions (where conventional test bodies would disturb the field).
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References
See, for example, de Boer, J. H., “Elektronenemission und Adsorptionserscheinungen”, 20 (Leipzig, 1937).
Erwall, L.-G., and Hillert, M., Research, 4, 242 (1951).
Jech, C., Nature, 161, 314 (1948).
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WESTERMARK, T., ERWALL, LG. Study of the Distribution of Surface Potential by means of Radioactive Deposits. Nature 169, 703–704 (1952). https://doi.org/10.1038/169703a0
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DOI: https://doi.org/10.1038/169703a0
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