Abstract
Fast two-electron exchange between neutral Sn2+ and doubly ionized Sn4+ impurity negative-U tin centers in partially compensated Pb0.98Sn0.02Na0.01Tl0.01S solid solutions has been found by emission Mossbauer spectroscopy on 119mmSn(119mSn) isotope; the lifetime of the Sn2+ and Sn4+ states changes from ∼6 × 10−4 to ∼8 × 10−9 s with a change in temperature from 295 to 900 K.
Published Version
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