Deep Ultraviolet Resonance Raman Excitation Enables Explosives Detection

Tuschel, David D.; Mikhonin, Aleksandr V.; Lemoff, B. E.; Asher, Sanford A.

doi:10.1366/000370210791114194

Cited by 122 publications

(183 citation statements)

References 84 publications

(99 reference statements)

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“…The explosive material in C4 is cyclotrimethylenetrinitramine (C 3 H 6 N 6 O 6 ). The spectra detected via standoff Raman spectroscopy coincides well with previously reported literature [16][17][18].…”

Section: Resultssupporting

confidence: 89%

Detection of Trace Explosive Materials by Standoff Raman Spectroscopy System

Abdulzahraa¹,

Hadi²,

Mohammad³

2017

JNUS

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Standoff Raman spectroscopy SRS technique is one of the most powerful technologies that can identify trace amount of explosive materials. The Raman scattered signal collected by reflective telescope and a spectrograph is used to analyze the Raman scattered light. In order to view the spectrum, the spectrograph is equipped with charge coupled device CCD detector which allows detection of very weak stokes line. In order to test the capability of SRS system of detecting explosives trace, detection of C4 and AN explosives have been achieved with limit of detection (LOD) about 20 µg for C4 and 40 µg for AN.

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Section: Resultssupporting

confidence: 89%

Detection of Trace Explosive Materials by Standoff Raman Spectroscopy System

Abdulzahraa¹,

Hadi²,

Mohammad³

2017

JNUS

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“…The spectra detected via standoff Raman spectroscopy coincide well with reference micro Raman spectrum as clearly shown in Fig. (6) as well as our standoff spectrum coincides well with previously reported literature [8][9][10]. Average difference of peak shift is about 3 cm -1 from that of Sandra Sadate et al [9] and in general the average difference of peak shift is about 2 cm -1 from that of micro Raman spectroscopy.…”

Section: Ammonium Nitrate Ansupporting

confidence: 91%

Standoff Raman Detection of Explosive Materials Using a Small Raman Spectroscopy System

Hadi¹,

Mohammad

Abdulzahraa

2017

JNUS

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In this work a standoff Raman spectroscopy SRS system has been designed, assembled and tested for detecting explosives (Ammonium nitrate, Trinitrotoluene and Urea nitrate) in dark laboratory at 4 m target-telescope distance. The SRS system employs frequency doubled Nd:YAG laser at 532 nm excitation with laser power of 250 mW and integration time of 2 second. The Cassegrain telescope was coupled to the Ventana Raman spectrometer using a fiber optics cable, and Notch filter is used to reject Rayleigh scattering light. The Raman scattered light is collected by a telescope and then transferred via fiber optic to spectrometer and finally directed into charge coupled device CCD detector. In order to test SRS system, it has been used to detect the Raman spectra of Toxic Industrial Compounds TIC such as acetone, toluene, and carbon tetrachloride. The SRS results were compared with conventional Raman microscopy results using a bench top Bruker SENTERRA Raman instrument.

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“…Spectra were recorded using thermoelectrically cooled and gated ICCD camera having 25 mm Gen II Intensifier. CCD array is having 1054 x 256 pixels where each pixel size is 26x26 µm 2 . CCD was kept cooled at -20 °C thermoelectrically to reduce the noise of detector.…”

Section: Detection Of Nitro-aromatic Compound In Soil and Sand Using mentioning

confidence: 99%

“…Detection of explosives has become more important in the last few decades because of the increasing terrorist activities at crowded places in several cities worldwide [1][2] . The growing threats and terrorist activities in last two decades have urged the need for rapid and accurate detection and identification of pre and post-blast samples.…”

Section: Introductionmentioning

confidence: 99%

Detection of Nitro-aromatic Compound in Soil and Sand using Time Gated Raman Spectroscopy

Gulati¹,

Gambhir²,

Reddy³

2017

Def. Sc. Jl.

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Laser based time-gated Raman Spectroscopy experiments for detection and identification of nitro-aromatic sample which premixed with soil and sand in different concentrations are conducted. A back-scattered stand-off Raman spectroscopy set-up using a frequency double Nd:YAG pulsed laser (532 nm, 8 ns, 10 Hz) was employed to evaluate samples made up of standard nitro-aromatic compounds, p-nitro Benzoic acid (PNBA) premixed with soil and sand at different concentrations. A sensitive ICCD detector was used to capture the weak Raman signals buried in high background noise at optimised experiments parameters like laser pulse energy, ICCD gate width, background subtraction, number of laser pulses averaging etc. p-nitro benzoic acid up to 5 per cent (v/v) concentration in sand with appreciable signal to noise ratio has been detected. This feasibility study also becomes relevant to evaluate the remnants for post-blast detection of explosives in terrorist attack as most of the explosives used in such attacks contain nitro-aromatic based high energetic explosives.

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Deep Ultraviolet Resonance Raman Excitation Enables Explosives Detection

Cited by 122 publications

References 84 publications

Detection of Trace Explosive Materials by Standoff Raman Spectroscopy System

Detection of Trace Explosive Materials by Standoff Raman Spectroscopy System

Standoff Raman Detection of Explosive Materials Using a Small Raman Spectroscopy System

Detection of Nitro-aromatic Compound in Soil and Sand using Time Gated Raman Spectroscopy

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