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

E. Malchukova (1) , B. Boizot (1) , G. Petite (1) , D. Ghaleb

1 LSI - Laboratoire des Solides Irradiés - Irradiated Solids Laboratory

Borosilicate glasses doped with samarium have been prepared. Samples exposed to 4 x 10(9) Gy of beta-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

E. Malchukova, B. Boizot, G. Petite, D. Ghaleb. Oxidation of Sm2+ in beta-irradiated Sm-doped borosilicate glasses under laser illumination. Journal of Luminescence, 2005, 111, pp.53. ⟨hal-00069226⟩