Structure ofVCenters in Irradiated KClO3

On the basis of the electron spin resonance spectra of a single crystal of KCl${\mathrm{O}}_3$ which has been exposed to x-irradiation, a model is proposed for the $V$ center produced. The center proposed consists of a ClO radical covalently bonded to a neighboring Cl${\mathrm{O}}_3^{-}$ ion. It is shown that the electron spin resonance spectra predicted for this radical agrees with the observed spectra, both in the number and spacing of the hyperfine, components and their orientation dependence in the external magnetic field. It is also proposed that an ${\mathrm{O}}_2^{-}$ center is produced rather than the usual $F$ center which one might expect to accompany the $V$ center.