Abstract
The Cd(I) center has been produced by both tritium β-particle irradiation and by γ-irradiation. The tritium was introduced as water of crystallization in calcium tetraacetato cadmium(II) hexahydrate in the form of THO. It is found that both forms of irradiation lead to the same center. The orientation of the hyperfine components of the Cd(I) center throws some light on the possible mechanism of its formation.