Oxidation of Sm2+ in β-irradiated Sm-doped borosilicate glasses under laser illumination

Borosilicate glasses doped with samarium have been prepared. Samples exposed to 4×109Gy of β-irradiation have been investigated by fluorescence measurements, showing a strong reduction process of Sm3+ to Sm2+ ions in the irradiated samples. Oxidation of Sm2+ was observed in this glass as a result of...

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Veröffentlicht in:	Journal of luminescence 2005-01, Vol.111 (1-2), p.53-59
Hauptverfasser:	Malchukova, E., Boizot, B., Petite, G., Ghaleb, D.
Format:	Artikel
Sprache:	eng
Schlagworte:	Amorphous materials, glasses and other disordered solids Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Glasses Irradiation Luminescence Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Photoluminescence Physics Thermoionization
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Zusammenfassung:	Borosilicate glasses doped with samarium have been prepared. Samples exposed to 4×109Gy of β-irradiation have been investigated by fluorescence measurements, showing a strong reduction process of Sm3+ to Sm2+ ions in the irradiated samples. Oxidation of Sm2+ was observed in this glass as a result of frequency-doubled cw Nd:YAG laser irradiation, but not when using a pulsed titanium-doped sapphire laser. Influence of laser intensity was studied, showing that an increase of the laser intensity could induce complete oxidation of Sm2+ ions. Such effect is not observed at low temperature nor using ultra short laser pulses. The conclusion is that the effect is of thermal origin.
ISSN:	0022-2313 1872-7883
DOI:	10.1016/j.jlumin.2004.06.004