Identification of concealed materials, including explosives, by terahertz reflection spectroscopy
نویسندگان
چکیده
منابع مشابه
Wideband terahertz spectroscopy of explosives
Time-domain terahertz spectroscopy (TDTS) has been shown to be a promising tool in detection of explosives and explosive related compounds. To date, TDTS for many explosives has been limited to spectral regions <3 THz. With recent improvements in emitters and sensors of THz radiation, we report the THz absorption spectra over an extended frequency band from 0.5 to 6 THz for four explosives: RDX...
متن کاملTHz Reflection Spectroscopy of Explosives Measured by Time Domain Spectroscopy
Terahertz range of electromagnetic spectrum (0.1 ÷ 10) THz has focused attention of scientists for years because of many interesting features including existence of spectral fingerprints of many materials (also explosives), through clothing imaging and safety for human being. Such advantages are of great importance for biochemical, defense and security related applications. Scanning of pure exp...
متن کاملTerahertz spectroscopy of explosives and drugs
The electromagnetic spectrum, illustrating the position of the terahertz (THz) frequency range with respect to the neighboring microwave/millimeter and mid-infrared (IR) regions of the spectrum, is shown in Fig. 1. The THz range is conventionally considered to be 0.3–10 THz ≡ 10–300 cm–1 ≡ 1–0.03 mm, although different authors adopt slightly different definitions. There has been considerable in...
متن کاملTerahertz spectroscopy of explosive materials
The terahertz spectrum of the explosive RDX has been measured using a conventional Fourier transform infrared spectroscopy and by terahertz pulse spectroscopy in transmission and reflection modes. Seven absorption features in the spectral range 5–120 cm have been observed and identified as the fingerprints of RDX explosive. Furthermore, a sample consisting of RDX-based explosive, mounted side b...
متن کاملNoninvasive detection of concealed explosives: depth profiling through opaque plastics by time-resolved Raman spectroscopy.
The detection of explosives concealed behind opaque, diffusely scattering materials is a challenge that requires noninvasive analytical techniques for identification without having to manipulate the package. In this context, this study focuses on the application of time-resolved Raman spectroscopy (TRRS) with a picosecond pulsed laser and an intensified charge-coupled device (ICCD) detector for...
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ژورنال
عنوان ژورنال: Optical Engineering
سال: 2013
ISSN: 0091-3286
DOI: 10.1117/1.oe.53.3.031202