Saturation effects in the excitation spectra of rare-earth ions

Donegá, Celso de Mello; Meijerink, Andries; Blasse, G.

doi:10.1016/0022-2313(94)90029-9

Cited by 42 publications

(21 citation statements)

References 30 publications

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“…The almost flat excitation spectrum in the entire UV rises the suspect that this is just an artefact related to so-called saturation effect, as described by de Mello Donegá et al [25]. This happens when the absorption coefficient is relatively high and the excitation layer of the specimen is significant.…”

Section: Resultsmentioning

confidence: 93%

Spectroscopic properties of sintered BaMgAl10O17:Eu2+ (BAM) translucent pellets

Zych

Goetz²,

Harrit

et al. 2004

Journal of Alloys and Compounds

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Section: Resultsmentioning

confidence: 93%

Spectroscopic properties of sintered BaMgAl10O17:Eu2+ (BAM) translucent pellets

Zych

Goetz²,

Harrit

et al. 2004

Journal of Alloys and Compounds

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“…[19][20][21][22][23][24] Later it turned out that the observation of enhanced intensity for vibronic lines in absorption spectra of lanthanides was related to saturation effects for the electronic lines at higher lanthanide concentrations and not to any specific concentration enhancement of the electron-phonon coupling. 25 For transition-metal ions, an influence of ion pairing may be apparent since the electronphonon coupling is larger. To investigate this possibility, the shown.…”

Section: Resultsmentioning

confidence: 99%

Temperature dependence of infrared-absorption lines ofCo2+in cadmium halides

2002

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Temperature-dependent infrared-absorption measurements were performed on the spin orbit and trigonalcrystal-field split levels of the 4 T 1g cubic-field ground term of Co 2ϩ (3d 7 ) in the cadmium halides CdX 2 ͑X: Cl, Br, and I͒. Besides ␥ 4 ϩ →␥ 4 ϩ and ␥ 4 ϩ →␥ 5,6 ϩ electronic transitions, sharp vibronic lines are observed. From temperature-dependent line shift and line-broadening measurements of these lines, electron-phonon coupling parameters were determined. For Co 2ϩ in CdCl 2 , where the energy separation of the ␥ 4 ϩ and ␥ 5,6 ϩ levels studied is comparable to the phonon energies, a contribution from direct one-phonon processes needs to be included. Further line-shift measurements were made on Co 2ϩ pair lines to determine whether the electron-phonon coupling differed for Co 2ϩ pairs, with no significant difference being observed. The infrared-absorption spectrum for Co 2ϩ in CdI 2 is reported.

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“…This difference can be explained by the fact that Verweij et al used a 100% Gd> crystalline material in which reabsorption may occur. The reabsorbed light is then redistributed over the zero-phonon and vibronic lines, and so the intensity of the vibronic sideband is enhanced with respect to the zero-phonon line (15). To obtain a correct R value, measurements should be performed on a diluted Gd> sample.…”

Section: ؉mentioning

confidence: 99%