Proliferation detection using a remote resonance Raman chemical sensor

Technical Report · Sun Aug 01 04:00:00 EDT 1993

DOI:https://doi.org/10.2172/10179119· OSTI ID:10179119

Sedlacek, A J; Chen, C L; Dougherty, D R

The authors discussed the potential of the resonance Raman chemical sensor as a remote sensor that can be used for gases, liquids or solids. This spectroscopy has the fundamental advantage that it is based on optical fingerprints that are insensitive to environmental perturbations or excitation frequency. By taking advantage of resonance enhancement, the inelastic scattering cross-section can increase anywhere from 4 to 6 orders of magnitude which translates into increased sensing range or lower detection limits. It was also shown that differential cross-sections as small as 10{sup {minus}27} cm{sup 2}/sr do not preclude the use of this technique as being an important component in one`s remote-sensing arsenal. The results obtained in the early 1970s on various pollutants and the more recent work on atmospheric water cast a favorable light on the prospects for the successful development of a resonance Raman remote sensor. Currently, of the 20 CW agent-related {open_quotes}signature{close_quotes} chemicals that the authors have investigated, 18 show enhancements ranging from 3 to 6 orders of magnitude. The absolute magnitudes of the measured resonance enhanced Raman cross-sections for these 18 chemicals suggest that detection and identification of trace quantities of the {open_quotes}signature{close_quotes} chemicals, through a remote resonance Raman chemical sensor, could be achieved.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 10179119
• Report Number(s): BNL--49247; CONF-930749--52; ON: DE93018847
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450300
CHEMICAL AND SPECTRAL PROCEDURES
CHEMICAL WARFARE AGENTS
DIFFERENTIAL CROSS SECTIONS
EXPERIMENTAL DATA
HAZARDOUS MATERIALS
INELASTIC SCATTERING
NUCLEAR EXPLOSION DETECTION
POLLUTANTS
RAMAN SPECTROSCOPY
REMOTE SENSING
VERIFICATION