Abstract content <br> (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>
Site-selective laser excitation studies of BaF2:Tm3+ single crystals performed at temperatures ranging from 10 K to 75 K are reported. There is a single dominant centre at the dopant concentrations of up to 0.1 mole% used. All the crystal-field energy levels for three multiplets (3H6, 3H4 and 3F2) of the centre and the fluorescence lifetime of the 3H4 multiplet are presented. From polarisation ratio measurements in <111>-oriented crystals the dominant centre is confirmed to be of C3v symmetry, with the charge-compensation interstitial F- ion in the next nearest neighbour position to the Tm3+ ion. Symmetry labels (irrep labels) have been assigned to the crystal-field energy levels. Vibronic coupling is apparent.
Level for award<br> (Hons, MSc, <br> PhD)?
Apply to be<br> considered for a student <br> award (Yes / No)?
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?