Chemical explosive detection using on-line prompt gamma activation technique

Conference · Fri Dec 31 04:00:00 EST 1993

OSTI ID:141232

Chung, C; Chao, J H; Chan, C C ^[1]

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1. Tsing Hua Univ., Hsichu (Taiwan, Province of China)

Application of on-line prompt gamma activation analysis technique to determine explosive-like materials hidden in luggage is presented. The explosive detecting assembly consists of five BGO scintillation detectors, five single channel analyzers, and one 20 {mu}g Cf-252 isotopic neutron source. Low level discriminator and energy window for each timing single channel analyzer were adjusted to proper energy range to detect the 10.8 MeV high-energy prompt photon emitted from the (n,{gamma}) reaction to which the nitrogen in chemical explosives is in high content. Urea is used in the lab test to simulate an explosive-like material. The space-flux distribution of thermal neutron near inspected luggage as well as the detection limit of explosive with various scan time were determined.

• OSTI ID: 141232
• Report Number(s): CONF-930304--
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
ACTIVATION ANALYSIS
BGO DETECTORS
CHEMICAL EXPLOSIVES
CONTAINERS
GAMMA DETECTION
INSPECTION
NUCLEAR CHEMISTRY
SENSITIVITY
THERMAL NEUTRONS