EPR and optical studies of $γ$ -irradiated MgO: Ga

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1 March 1979

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 19 (5) , 2436-2439
https://doi.org/10.1103/physrevb.19.2436

Abstract

EPR lines which appear when MgO: Ga is

γ

-irradiated at room temperature have been assigned to

{Ga}^{2 +}

ions in substitutional cation sites. For

{}^{69}{Ga}

at 77 K, we have

g = 1.996 \pm 0.0005

and

A = 8.563 \pm 0.008

GHz. Optical absorption bands at 370 and 300 nm in

γ

-irradiated MgO: Ga have been attributed to

{Ga}^{2 +}

and

{Ga}^{1 +}

, respectively, as a result of bleaching and annealing experiments.

Keywords

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