Year: 2004
Type: article
Abstract: We have measured the refractive index, extinction coefficient, and absorption coefficient of the explosive C-4 by THz time-domain spectroscopy and examined its applicability to detecting C-4 in mails. The explosive C-4, which is used in almost all mail-bomb terrorist activities, shows six THz bands in the frequency region from 5 to 90 cm -1 (150 GHz–2.7 THz). The 26.9 cm -1 band is very strong and can be used as a fingerprint of C-4. We confirmed that the THz absorption spectrum of C-4 hidden inside an envelope coincides essentially with that of C-4 itself. We also examined the applicability of the THz reflection spectroscopy to C-4 detection by calculating the reflectance spectra. Our results demonstrate that the THz techniques are very promising for counterterrorism against C-4 mail bombs.
DOI: 10.1143/jjap.43.l414
Authors: Kohji Yamamoto, Mariko Yamaguchi, Fumiaki Miyamaru, Masahiko Tani, Masanori Hangyo, Takeshi Ikeda, Akira Matsushita, Kenji Koide, Michiaki Tatsuno, Yukio Minami
Institutions: The University of Osaka, Osaka Prefectural Police Department
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1995353860