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Radiation Protection Dosimetry 33:15-18 (1990)
© 1990 Oxford University Press

Mechanism of Storage of Ionising Radiation Energy in LiF:Mg, Ti Crystals

B.I. Rogalev, S. Mysovsky, A.I. Nepomnyachikh and V.G. Chernov

Ionising radiation energy is stored in LiF:Mg,Ti as a result of radiative reduction of initial divalent magnesium ion-cation vacancy dipoles (Mg2+ centres) to univalent (Mg+ centres) and atomic (Mg0 centres) states. The Mg+ centre is created through decay of self-trapped excitons near Mg2+ centres. The Mg0 centre is formed owing to electron capture by a Mg+ centre. Calculations of electronic and spatial structure and dose dependences of radiative creation of these centres have been made. The dose dependences of the F, Mg+ and Mg0 centres, radiative creation have been obtained using LiF:Mg (0.003 - 0.3 wt %) crystals irradiated by gamma rays. Comparisons of the experimental results with computed ones confirm the validity of the model used.


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