Abstract

To date 268 even and 255 odd atomic energy levels in Th i have been found. The lowest level of the configuration 5f 6d 7s² is ³H₄⁰ and lies 7795.27 cm⁻¹ above the ground level ³F₂ of 6d² 7s². Some levels of 5f 6d² 7s and 6d² 7s 7p are identified.

© 1968 Optical Society of America

First Spark Spectrum of Thorium—Classification and Zeeman Effect Data of Th II

J. Rand McNally, George R. Harrison, and Helen B. Park
J. Opt. Soc. Am. 32(6) 334-347 (1942)

First Spark Spectrum of Thorium—Infra-Red Spectrum and Further Classification of Th II*

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J. Opt. Soc. Am. 35(6) 390-398 (1945)

Energy levels of the first spectrum of curium, Cm i*

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Analysis of the Spectrum of Neutral Erbium (Er i)

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Term analysis of the spectrum of neutral neptunium (Np i)*

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