Accession Number : ADA311000
Title : The Absorption Spectrum of Americium.
Corporate Author : CALIFORNIA UNIV MERCURY NV LAWRENCE RADIATION LAB
Personal Author(s) : Stover, B. J. ; Conway, J. G. ; Cunningham, B. B.
PDF Url : ADA311000
Report Date : 03 AUG 1950
Pagination or Media Count : 5
Abstract : The absorption spectra of aqueous solutions and solid compounds of americium have been investigated with a Baird 3-meter grating spectrograph. The relation of the spectrum to that of other actinide and rare-earth compounds is discussed. It has long been observed that the absorption spectra of the trivalent rare-earth ions possess a unique sharpness, the structure of the peaks being discernible at room temperature and even in solutions. This phenomenon has also been observed in the case of the electronically analogous actinide elements. The generally accepted explanation for the origin of the lines in the rare-earth spectra is that they result from transitions within the 4f electron shell. Trivalent europium, the analog of americium, has been shown by absorption spectra and magnetic susceptibility data to have a 4f(6) electron configuration, a (7)F sub 0 ground state, and one or more low-lying excited levels. Since americium ion probably has a 5f(6) configuration, it also is expected to have a singlet ground state and one or more low-lying excited levels. p4
Descriptors : *ABSORPTION SPECTRA, *RARE EARTH ELEMENTS, *AMERICIUM, IONS, MAGNETIC PROPERTIES, SOLUTIONS(MIXTURES), WATER, EXCITATION, CRYSTALS, SOLIDS, ROOM TEMPERATURE, ELECTRONS, SPECTRA, CONFIGURATIONS, LOW LEVEL, VALENCE, GROUND STATE, ATOMIC STRUCTURE, ATOMIC ENERGY LEVELS, EUROPIUM, ACTINIDE SERIES.
Subject Categories : Inorganic Chemistry
Electricity and Magnetism
Atomic and Molecular Physics and Spectroscopy
Distribution Statement : APPROVED FOR PUBLIC RELEASE