Electron spin resonance measurements were performed on N-free films grown by chemical vapor deposition, and on diamond single crystals; bombarded with 17O ions and annealed at 100 to 1400C. For those annealed at 700 to 1050C, the spectra were dominated by the R5, O1, R6, R10, R11 and KUL11 centers. The analysis of single-crystal and powder-pattern electron spin resonance spectra permitted the tracing of the 13C hyperfine interaction structure and the deduction of accurate values for the spin Hamiltonian parameters of those centers. The interpretation of those values confirmed a previous suggestion that the R5, O1, R6, R10, R11 and KUL11 centers might originate from <110> chains of 3, 4, 5, 6, 7 and 8 vacancies, respectively. These centers disappeared, after annealing at 1150C, to reveal an S = 1/2 center (labelled KUL12) with a resolved 17O hyperfine structure.

Dominant Paramagnetic Centers in 17O-Implanted Diamond. K.Iakoubovskii, A.Stesmans: Physical Review B, 2002, 66[4], 045406 (7pp)