Spectral Properties of Americium(III) in Silicate Matrices: Concentration-Dependent Up-Conversion Emission

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We have been pursuing the spectroscopic properties of actinide ions in silicate matrices. One facet of these studies involves the behavior of Stokes and anti-Stokes emissions exhibited by Am'' in these hosts. Several attributes have been found to influence the spectral profile, which include excitation wavelength, laser power, and dopant-concentration. Excitation with the 514.5 nm (19435 cm{sup -1}) line of argon laser provides anti-Stokes emissions at 21100 and -19920 cm{sup -1} in the boro-silicate matrices. This up-conversion was found to proceed through a multi-photon scheme, and its' efficiency increases with increased dopant concentration. Based on our concentration-dependent studies, the up-conversion ... continued below

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5 pages

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Assefa, Z. November 2, 2001.

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We have been pursuing the spectroscopic properties of actinide ions in silicate matrices. One facet of these studies involves the behavior of Stokes and anti-Stokes emissions exhibited by Am'' in these hosts. Several attributes have been found to influence the spectral profile, which include excitation wavelength, laser power, and dopant-concentration. Excitation with the 514.5 nm (19435 cm{sup -1}) line of argon laser provides anti-Stokes emissions at 21100 and -19920 cm{sup -1} in the boro-silicate matrices. This up-conversion was found to proceed through a multi-photon scheme, and its' efficiency increases with increased dopant concentration. Based on our concentration-dependent studies, the up-conversion is suggested to involve a cross-relaxation process [({sup 5}D{sub 1}, {sup 7}F{sub 0}{sup 7}F{sub 6}, {sup 7}F{sub 2})] between neighboring americium ions.

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5 pages

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  • Actinides 2001, Hayama (JP), 11/04/2001--11/09/2001

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  • Report No.: P01-112406
  • Grant Number: AC05-00OR22725
  • Office of Scientific & Technical Information Report Number: 788902
  • Archival Resource Key: ark:/67531/metadc724777

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • November 2, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • March 23, 2016, 6:52 p.m.

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Assefa, Z. Spectral Properties of Americium(III) in Silicate Matrices: Concentration-Dependent Up-Conversion Emission, article, November 2, 2001; Tennessee. (digital.library.unt.edu/ark:/67531/metadc724777/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.