Paramagnetic hyperfine structure in151Eu Mossbauer spectra of Eu2+ions in borate glasses

Europium borate glasses containing 0.1-33 mol.% EuO have been prepared to study the 151 Eu Mossbauer spectra. The results depend strongly on the concentration of Eu 2+ ions in the glasses. In diluted systems, split patterns have been observed which originate from paramagnetic hyperfine interactions, as proved by the addition of Mn 2+ ions to the glass. There is only a weak dependence on temperature.