Abstract
Cerium-activated lutetium oxyorthosilicate Lu2SiO5:Ce3+ (LSO:Ce) and coactivated LSO:Ce,Dy and LSO:Ce,Yb crystals have been synthesized by the sol-gel technique. It is shown that the introduction of coactivator (Yb and Dy) ions influences the energy storage in LSO:Ce, thus making it possible to control the afterglow and thermoluminescence in these crystals. The observed effect is related to the electron properties of coactivator ions (donor against acceptor), which determine the recharge of electron traps in LSO crystals.
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