Abstract

For routine quantitative spectrographic analysis of phosphorus, using the line at 2136A, the Geiger-Müller photoelectron counter has certain advantages over both the photographic plate and the electron multiplier photo-tube. The construction of the counters and the methods of electrically shielding and mounting them on the Littrow spectrograph are briefly described. The adjustments of counter orientation, slit widths, and focus are discussed with reference to the analyses of ferrous alloys where good resolution is necessary. Because of the absorption of radiation by quartz at low wave-lengths, both absolute and relative intensities are dependent upon the position of the arc on the electrode surface. This effect, which results in appreciable error in the measured percentage composition of a sample, is investigated photographically and with G-M counters, and several methods of reducing the effect are discussed. The effect of temperature changes of the dispersing prism on line position is investigated and a suitable method of control is mentioned. Preliminary consideration of this direct-reading method shows that it seems possible to reduce the various errors so that the source fluctuation is the controlling factor.

© 1948 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
An Industrial Application of Geiger-Müller Counters to the Analysis of Phosphorus in Steels

Ford R. Bryan and George A. Nahstoll
J. Opt. Soc. Am. 38(6) 510-517 (1948)

An Investigation of the Properties and Applications of the Geiger-Müller Photoelectron Counter*

O. S. Duffendack and W. E. Morris
J. Opt. Soc. Am. 32(1) 8-24 (1942)

Detection of Lead in Air with the Aid of a Geiger-Müller Counter

O. G. Koppius
J. Opt. Soc. Am. 39(4) 294-297 (1949)

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 (6)

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

Equations (3)

You do not have subscription access to this journal. Equations 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