The coloring and thermophosphorescence produced in transparent minerals and gems by radium radiation.*

✍ Scribed by S.C. Lind; D.C. Bardwell

• Publisher: Elsevier Science
• Year: 1923
• Tongue: English
• Weight: 572 KB
• Volume: 196
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(23)91013-6

✦ Synopsis

IN an earlier paper' one of us reported some observations on the coloring, decolorization and thermophosphorescent effects resulting from the radiation of glass by radium rays . Similar experiments, extended to transparent minerals and gems, are described in the present paper .

The following terminology has been adopted

By thermal stimulation in general is meant that produced by raising the temperature above the normal, but this is not to be understood as precluding the possibility that a phosphorescent effect at ordinary temperature may vanish at a lower one, showing it to have been really thermal in nature . By radiative stimulation is meant that by any radiation (including corpuscular) except that form included under heat radiation . Under this usage the term thermoluminescence,, previously used, becomes thermophosphorescence. A study of luminescence and thermoluminescence (new definition) is not included in the present paper .