RADIATION-INDUCED PARAMAGNETIC SILVER CENTERS IN LINASO4

The results of ESR investigations carried out on gamma-irradiated Ag-d oped lithium sodium sulphate (LiNaSO4) at LNT (77 K) are reported here . Two different centres of Ag (Ag-0, Ag2+) have been observed at 77 K. In the case of Ag2+ the parameters are g(xx) = 2.071 +/- 0.001, g(yy) = 2.102 +/- 0.001, g(zz) = 2.402 +/- 0.001, A(xx) = 18 +/- 1 G, A(yy) = 20 +/- 1 G, and A(zz) = 26 +/- 1 G. The ground-state wave function has been found to consist primarily of d(x2-y2) With a reasonable admi xture of other orbitals. The extent of delocalization of the electron in the Ag2+ has been estimated. For Ag-0 the parameters g and A are fo und to be isotropic.