Abstract

The photoelectric currents from freshly prepared metal films have been compared with photocurrents from the same metal exposed to air for the spectral region of the volume photoelectric threshold. The fresh films were evaporated onto air-exposed films with initial pressures in the low 10−8 torr region, and pressures during evaporation in the 10−6 to 10−7 torr region. Using the data of Walker, Rustgi, and Weissler, photoelectric yields per incident photon were obtained for fresh films of aluminum, bismuth, and indium. The steep slope in the photoelectric yield per incident photon as a function of wavelength, usually found in air-exposed evaporated films, films evaporated at higher pressures than reported here, and bulk samples, and interpreted as the onset of the volume photoelectric effect, almost disappears for the fresh films, but reappears when air is admitted into the chamber. Moreover, the quantum yield per incident photon for Al, the only one of the three metals for which reflectance data are available for films evaporated at soft ultrahigh vacua, is constant within 15% over the whole measured range. These data strongly suggest that previously measured volume photoelectric thresholds in metals between 8 eV and 9.5 eV are the result of gaseous contamination of the metals.

© 1966 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Comments on “Volume Photoelectric Effect in Metals”

F. Wooten and T. Huen
J. Opt. Soc. Am. 57(1) 102-103 (1967)

Photoelectric effect from a metal surface: a revisited theoretical model

R. Daniele, G. Ferrante, E. Fiordilino, and S. Varró
J. Opt. Soc. Am. B 9(10) 1916-1921 (1992)

Metal Photocathodes as Secondary Standards for Absolute Intensity Measurements in the Vacuum Ultraviolet*

R. B. Cairns and J. A. R. Samson
J. Opt. Soc. Am. 56(11) 1568-1573 (1966)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription