Title :
FTIR spectroscopy of annealing processes in neutron irradiated diamonds
Author_Institution :
Inst. Yakutniproalmaz, ALROSA Co. Ltd., Mirny, Russia
Abstract :
Natural diamonds with nitrogen defects at a concentration of about 10/sup 20/ cm/sup -3/ were investigated after irradiation by neutrons at a temperature of 330-340 K at a dose of 10/sup 19/ cm/sup -2/. Detailed thermal perturbations in the 1200-1800 cm/sup -1/ region were investigated by isochronal annealing with 10 min and 50 K steps. The upper temperature limit was 850 K because of oxidation onset. The spectra were rexamined after each annealing step. Immediately after irradiation the crystals were absolutely black, making it impossible to register or determine the GR1 centers concentrations. The first lines to appear were at 1530 and 1370 cm/sup -1/.
Keywords :
Fourier transform spectra; annealing; colour centres; diamond; impurity absorption spectra; infrared spectra; neutron effects; nitrogen; 10 min; 1200 to 1800 cm/sup -1/; 1370 cm/sup -1/; 1530 cm/sup -1/; 330 to 340 K; 850 K; C:N; FTIR spectroscopy; annealing processes; neutron irradiated diamonds; Absorption; Annealing; Heating; Isotopes; Neutrons; Nitrogen; Oxidation; Satellites; Spectroscopy; Temperature;
Conference_Titel :
Wide Bandgap Layers, 2001. Abstract Book. 3rd International Conference on Novel Applications of
Conference_Location :
Zakopane, Poland
Print_ISBN :
0-7803-7136-4
DOI :
10.1109/WBL.2001.946572
