The Light Emitted by Europium Compounds

Przibram, Karl

doi:10.1038/163989a0

Cited by 6 publications

(5 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The vibration-electronic interaction has been considered by Satten (1957), with special reference to the spectra of neodymium salts. Because of this difficulty in interpreting the crystal spectra, Elliott, Judd and Runciman (1957) have calculated the energy levels of the multiplets in the Russell-Saunders approximation using the tensor-operator and group-theoretical methods of Racah (1949). Assignments of levels to the various line groups can be made, and tested by detailed calculations of the crystal splittings.…”

Section: $ 4 R a R E -E A R T H I O N S 41 Outline Of Theorymentioning

confidence: 99%

“…Holmium is of interest because of its correspondence with the naturally missing element promethium which has four f-electrons. From an analysis of the fluorescence spectra of Gobrecht (1938) andRosenthal (1939), Judd (1956) has deduced f = 2080 cm-l. 4fll : Er3+, ground state 4115,,9 orbit matrices obtained for f 3 will be applicable to this ion. 4f1,: Tm3+, ground state 3H, T h e theoretical interpretation has been discussed by Bethe and Spedding (1937), who found that spin-orbit interactions produce very large corrections, up to 10 000 cm-l, to the Russell-Saunders levels.…”

Section: Trivalent Ionsmentioning

confidence: 99%

“…The absorption spectrum of YbC13.6H,0 consists of two sharp lines near Dieke and Crosswhite (1956) 4.6. Divalent Ions Divalent europium, isoelectronic with Gd3+, has been studied by Freed and Katcoff (1948), Przibram (1949) and by Gruen, Conway and McLaughlin (1956). Freed and Katcoff find the absorption is stronger, by at least a factor of 100, than that of the trivalent ions.…”

Section: Geisler and Hellwege (1953) Have Obtained The Absorption And...mentioning

confidence: 99%

“…Unfortunately it will not be possible to include an account of irradiation effects. The irradiation colours and luminescence in minerals have been recently described by Przibram (1956). Many interesting problems are raised by the fluorescence of minerals, an example being the origin of the vibrational structure in the sulphurcontaining aluminosilicates of the sodalite type (Kirk 1954).…”

mentioning

confidence: 99%

See 3 more Smart Citations

Absorption and fluorescence spectra of ions in crystals

Runciman

1958

Rep. Prog. Phys.

View full text Add to dashboard Cite

The absorption and fluorescence spectra provide direct information about the energy levels of the ions in a crystal. Alternatively, the ions may be regarded as probes measuring the crystalline field. The introduction deals with the influence of the crystal on the energy levels of the free ions. After a brief description of the experimental techniques, which include measurements down to ~O K , the various ion groups are considered in some detail. Ions of the 3d group are often in approximately octahedral surroundings, and the spectra of such complex ions are described. Then the 4d and 5d groups are discussed. The theory of the spectra of rare-earth salts is reviewed with special reference to polarization and Zeeman effects, and the individual ions are considered. Lastly there are two sections devoted to the heavy metal ions, including thallium, and to uranium and the transuranics, which are of interest because of the importance of the 5f electrons in the interpretation of the spectra. $ 1 . I N T R O D U C T I O NH E study of the optical spectra of crystals is one of the oldest branches of spectroscopy, and some of the substances found to be of interest in the late T nineteenth century, e.g. ruby and the uranyl salts, are still actively investigated today. Since optical absorption is essentially a process in which a quantum of light is absorbed, it is not surprising that theoretical understanding was delayed

show abstract

Section: $ 4 R a R E -E A R T H I O N S 41 Outline Of Theorymentioning

confidence: 99%

Section: Trivalent Ionsmentioning

confidence: 99%

Section: Geisler and Hellwege (1953) Have Obtained The Absorption And...mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Absorption and fluorescence spectra of ions in crystals

Runciman

1958

Rep. Prog. Phys.

View full text Add to dashboard Cite

show abstract

“…It is well known that alkaline earth sulfide phosphors containing europium as the activator show band emission (1)(2)(3)(4)(5)(6)(7). It is also known that europiumactivated alkaline earth oxides show line emission (5,6,8,9).…”

Section: Introductionmentioning

confidence: 99%

Oxidation States of Europium in the Alkaline Earth Oxide and Sulfide Phosphors

Jaffe

Banks²

1955

J. Electrochem. Soc.

View full text Add to dashboard Cite

Emission and absorption spectra of the alkaline earth sulfides activated with europium and fired in a neutral atmosphere have been re-investigated. The emission and absorption spectra of the alkaline earth oxides, also activated with Eu, and fired in a neutral or a reducing atmosphere have been obtained. The sulfides show both band emission and band absorption, as does SrO fired in hydrogen. The other hydrogen-fired oxides have band absorption, except for MgO, and give either mixed band and line emission or only line emission. The nitrogen=fired oxides, except MgO, give line emission and little, if any, selective absorption. MgO emits a broad line spectrum for both the nitrogen-and hydrogen-fired samples and shows no absorption peaks. Emission and absorption spectra have been correlated with the oxidation state of the activator in the several phosphors, the line emissions being associated with the presence of Eu +a and the band emissions with Eu +2.

show abstract

Fluorescent Minerals of the United States

Robbins¹

1983

The Collector’s Book of Fluorescent Minerals

View full text Add to dashboard Cite

The Light Emitted by Europium Compounds

Cited by 6 publications

References 2 publications

Absorption and fluorescence spectra of ions in crystals

Absorption and fluorescence spectra of ions in crystals

Oxidation States of Europium in the Alkaline Earth Oxide and Sulfide Phosphors

Fluorescent Minerals of the United States

Contact Info

Product

Resources

About