Abstract

This report is the first of a series associated with the development of the spectrographic determination of uranium 235 at the <i>Oak Ridge Gaseous Diffusion Plant</i> The present report, summarizing the development prior to November 1950, deals with the precision obtained using d c arc excitation, photographic recording, and a 21-foot <i>Jarrell-Ash</i> Wadsworth spectrograph in the second order. Measurements were made employing different spectral lines, slit widths, and slit types. For each determination consisting of the average of 10 measurements, a precision of ±0.04 weight per cent uranium 235, expressed at the 95% confidence level, was obtained in the vicinity of naturally occurring uranium (0.7115% uranium 235).

Spectrographic Determination of Trace Elements in 70/30 Brass and Admiralty Brass. Part I*

P. A. Leichtle
J. Opt. Soc. Am. 34(8) 454-463 (1944)

The Quantitative Spectrographic Analysis of the Rare Earth Elements*I. Determination of Samarium in NeodymiumII. Determination of Europium in Samarium

Velmer A. Fassel and Harley A. Wilhelm
J. Opt. Soc. Am. 38(6) 518-526 (1948)

The Spectrographic Detection of Selenium in the D.C. Arc Flame*

Cyrus Feldman
J. Opt. Soc. Am. 35(2) 180-184 (1945)

Nuclear Spin of Uranium-235

K. L. Vander Sluis and J. R. McNally
J. Opt. Soc. Am. 45(1) 65-65 (1955)

Some Applications of Photomultiplier Tubes to Spectrographic Analysis

James K. Brody
J. Opt. Soc. Am. 42(6) 408-415 (1952)