DYNAMIC-MODEL FOR THE STRUCTURE OF BOND-CENTERED MUONIUM IN SILICON

Ab initio restricted Hartree-Fock calculations have been carried out t o determine the most stable structures for bond-centered muonium in cr ystalline silicon, the model generally accepted to explain the anomalo us muonium state or Mu. The silicon crystal was represented by either the Si20H30 or the Si26H30 cluster. In addition to the zero-point mot ion of the muon, the motion of the adjacent silicon atoms has also bee n considered.