Abstract

The spectrum of neutral chlorine excited by means of a Raytheon Microtherm unit in electrodeless tubes filled with the pure gas has been observed in the region between 10 000 and 25 000 A. A description has been prepared giving wavelengths, wave numbers, and relative intensities of 283 radiometrically observed lines. Newly classified lines selected from a recent set of photographic observations by Corliss in the interval between 7000 and 10 000 A are included. Extensions to the established classification include identification of all 22 of the previously unobserved levels of the family associated with the ³P ion limit, comprising the levels from the 3s²3p⁴5s and 3s²3p⁴3d configuration. From a study of this material, along with his list of wave numbers, Corliss has found fourteen new odd levels. Further systematic combing of the data by use of an automatic computing program has revealed four additional odd levels. The new odd levels originate probably in the 3s²3p⁴4f configuration.

© 1959 Optical Society of America

Arc Spectrum of Germanium*†

Kenneth L. Andrew and K. W. Meissner
J. Opt. Soc. Am. 49(2) 146-161 (1959)

Atomic Energy Levels and Spectra of Neutral and Singly Ionized Phosphorus (P i and P ii)*†

William C. Martin
J. Opt. Soc. Am. 49(11) 1071-1085 (1959)

Wavelengths, Energy Levels, and Analysis of Neutral Atomic Chlorine (Cl i)

Leon J. Radziemski and Victor Kaufman
J. Opt. Soc. Am. 59(4) 424-443 (1969)

First Spectra of Chlorine, Bromine, and Iodine in the 1.8–4.0-μm Region

Curtis J. Humphreys and Edward Paul
J. Opt. Soc. Am. 62(3) 432-439 (1972)

First Spark Spectrum of Arsenic*

Hui Li and Kenneth L. Andrew
J. Opt. Soc. Am. 61(1) 96-109 (1971)