Trace Chemical Threat Detection by Ultraviolet Multiphoton Induced Fragment Fluorescence
Abstract
ArF excimer laser radiation has been used to dissociate dimethylmethylphosphonate (DDMP) and diethylmethylphosphonothioate (DEMPS) into electronically excited fragments. Spectrally resolved UV and visible emission identifies the excited fragments from DMMP as C, C2 nd CH and those from DEMPS as C2, CH, PO and possibly PS and CS. In the few cases tested, the emission intensity is linear with respect to parent molecule concentration and persists in the presence of 100 torr of air. The excited fragment emissions could be the basis of a sensitive detection technique for these or similar molecules.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1984
- Accession Number
- ADA140344
Entities
People
- A. Freedman
- C. E. Kolb
- D. S. Frankel
Organizations
- Aerodyne Research