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Positive rays produced by ultra-violet light

DuBridge, Lee A. (1925) Positive rays produced by ultra-violet light. Physical Review, 25 (2). pp. 201-207. ISSN 0031-899X.

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Experimental test for positive photo-electric emission from Au, Cu and Al. — Following the announcement by Dember in 1909 that positive emission had been observed, an attempt was made to verify its existence under improved conditions. His experiment was repeated using light from a quartz mercury arc and curves similar to his obtained. It was found, however, that when proper precautions against scattered light effects were taken, no true positive current could be detected from Au, Cu, or Al surfaces, and it is shown that the Dember effect may be accounted for on the basis of spurious currents due to scattered light. Outgassing of the surface failed to cause the appearance of any positive current.

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Additional Information:© 1925 The American Physical Society. Received 30 September 1924. In conclusion I wish to express my appreciation to Prof. C. E. Mendenhall who suggested the problem and under whose direction the above work was carried on.
Issue or Number:2
Record Number:CaltechAUTHORS:DUBpr25
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3658
Deposited By: Tony Diaz
Deposited On:25 Jun 2006
Last Modified:12 Dec 2019 17:06

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