The electric quadrupole interaction at iodine implanted in zinc and cadmium single crystals is investigated, using the β-γ perturbed angular correlation technique. The results show that the implanted129Te and132Te isotopes occupy two well-defined sites, identified by the electric field gradient parameters. One fraction of the impurities is substitutionally implanted, with eqzz=-1.49(9)1018 and -1.58(15)1018V/cm2, in Zn and Cd respectively. The other fraction is identified as an impurity-divacancy configuration with |eqzz|=3.81(8)1018V/cm2; η=0.72(4) for Zn and |eqzz|=3.55(11)1018V/cm2; η=0.53(13) for Cd. The electronic enhancement in the electric fieldgradient at the substitutional site equals K=-0.66 and -0.56 respectively and follows the empirical trend of K versus the impurity valence for the s-p elements in Zinc.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics
- Condensed Matter Physics
- Physical and Theoretical Chemistry