Analysis of color center thermoluminescence in KCl crystals

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Robert Lee Miller (Creator)
The University of North Carolina at Greensboro (UNCG )
Web Site:
R. Whitlock

Abstract: It has been known for almost two hundred years that some elements, usually transparent, are sometimes discovered in nature to exhibit a particular color of the visible spectrum. As early as 1800 researchers reported that these colored materials could be bleached out and re-colored by using electric sparks, ultraviolet light or other high energy radiation. Studies of coloring became more systematic after 1896 when Goldstein found that these materials could be colored by irradiation. One of the earlier researchers, Pohl in 1937, coined the name "color centers" for coloring in solids due in some way to electrons. Since then many models of color centers have been proposed. However, experiments which confirm these models have been very difficult to devise. With the increasing interest in solid state physics and studies of imperfections in crystalline structure, physicists began to believe that color centers were related to imperfections in the solids.1 Color centers of many different types are known to exist in crystals, In 1946 Seitz2 proposed models of some of the color centers occuring in the alkali halide crystals. Since then much research has been done to test the validity of these models.

Additional Information

Language: English
Date: 1972
Color centers
Potassium chloride
Alkali metal halide crystals

Email this document to