Radioactive Equilibrium of 119mTe/119Sb Isotopes and Mössbauer Spectra of Impurity 119mSn Atoms in Crystalline and Vitreous Chalcogenide Semiconductors

Resumo

Information on the valence and coordination states of the daughter ^119mSn atoms formed from the parent ¹¹⁹Sb and ^119mTe atoms at the cation and anion sites of crystalline lead chalcogenides (PbS, PbTe) and vitreous arsenic chalcogenides (As₂S₃, As₂Te₃) is obtained by the method of emission Mössbauer spectroscopy with the parent ^119mTe isotope being in a state of mobile radioactive equilibrium with the daughter ¹¹⁹Sb isotope. It is shown that the ratio of different valence and coordination states of tin atoms in crystals and glasses depends on the time of the preparation of Mössbauer sources. The displacement of a part of the daughter ¹¹⁹Sb atoms from positions of parent ^119mTe atoms as a result of the decay of the latter is demonstrated.