NEW DATA ON THE STRUCTURE OF THE R1 AND R2 RADIATION CENTERS IN DIAMOND

In the ESR spectra of electron-irradiated diamonds of different types, a region near g = 4.3 is analyzed. Forbidden transitions Delta M = 2 of R1 and R2 have been found for some centers with S = 3/2 in diamonds of type Ic. For the forbidden transitions of R1, the hyperfine struct ures in four coordination spheres of C-13 have been investigated Based on the results obtained it is shown that the R1 center is a semivacan cy pair. For the forbidden transitions of the R2 center, intensity rat ios and hfi constants, which are unusual in vacancy type defects, have been found The observed set of centers with S = 3/2 for irradiated di amonds of type 1c is explained by electron transfer from the donor nit rogen atom to the known radiation centers with S = 1.