ISSN: 0022-1198
CODEN: JFSCA
Published Online: 1 July 1986
Page Count: 15

Lasers and Optical Spectroscopy in Questioned Document Examination
Menzel, ER
Associate professor, Physics Department, and director, Center for Forensic Studies, Texas Tech University, TX

Wilde, JP
Research assistants and research associate, respectively, Center for Forensic Studies, Texas Tech University, TX

Everse, KE
Research assistants and research associate, respectively, Center for Forensic Studies, Texas Tech University, TX

Sinor, TW
Research assistants and research associate, respectively, Center for Forensic Studies, Texas Tech University, TX

(Received 17 October 1985; accepted 19 November 1985)

Abstract

The use of in situ laser-luminescence and excitation spectroscopy for examination of questioned documents is investigated. It is found that such spectroscopy can at times discriminate between similar inks when conventional methods are unsuccessful. A particularly effective procedure for room temperature luminescence enhancement is presented and compared with luminescence at cryogenic temperatures.

Keywords:
criminalistics, questioned documents, lasers, absorption, emission, luminescence, excitation, thin-layer chromatography

Paper ID: JFS11093J
DOI: 10.1520/JFS11093J
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