STUDY OF LOCAL MAGNETIC FIELDS IN OXIDE ~-Bi2Oa BY NQR AND pS)~ TECHNIQUES THE

NQR and #SR investigations of the local magnetic field in c~-Bi2Oa were performed. In the NQ.R experinaents on a-Bi203 which is usually considered as diamagnetic, the splitting of the spectral lines revealed a local field on the bismuth nuclei. The internal magnetic field obtained by pSR significantly exceeds the dipole field from Bi nuclear magnetic nmments. A possible source of the local magnetic fields is partial covalent bonds in c~-Bi,,O3.