= G. R. Lumpkin
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<G. R. Lumpkin> studies the relationships between mineral chemistry, microstructure and damage from <radioactive decay>. Work on naturally occurring uranium-bearing material connects accumulated <alpha decay> damage with observations of composition and structure.<Chemistry, microstructure, and alpha decay damage of natural brannerite by G. R. Lumpkin and others>[Abstract: mineral chemistry, microstructure and radiation damage]{ref}
Such natural samples provide long-duration evidence relevant to candidate host materials for radioactive elements. Their interpretation must account for composition, thermal history and alteration, rather than treating elapsed geological time alone as a controlled irradiation experiment.
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