EFFECTS OF HIGH-PRESSURE ON THE FLUORESCENCE-SPECTRA OF CR3+ IN GDALO3

The effect of high hydrostatic pressure, up to 100 kbar, on the emissi on spectra of cr(3+) ions in GdAlO3 hosts was studied. A linear shifti ng (red-shift) of the single-ion line (the R line), the left-hand side (LS) line, right-hand side (RS) line and the neighbouring-pair line ( NPL) was observed. The R line shows a pressure-induced shift of 0.082 nm kbar(-1), nearly 2.25 times that of ruby. The LS line, RS line and NPL show pressure-induced shifts of 0.0779 nm kbar(-1) 0.0864 nm kbar( -1) and 0.0933 nm kbar(-1), respectively.