A comparison of {sup 252}Cf and 14-MeV neutron excitation to identify chemical warfare agents by PGNAA

Journal Article · Sat Jul 01 04:00:00 EDT 2000 · Transactions of the American Nuclear Society

OSTI ID:20093653

Caffrey, A J; Harlow, B D; Edwards, A J; Krebs, K M; Jones, J L; Yoon, W; Zabriskie, J M; Dougan, A D

Since 1992, Idaho National Engineering and Environmental Laboratory's portable isotopic neutron spectrometry (PINS) system has been widely used for the nondestructive assessment of munitions suspected to contain chemical warfare agents, such as the nerve agent sarin. PINS is a {sup 252}Cf-based prompt gamma-ray neutron activation analysis (PGNAA) system. The standard PINS system employs a partially moderated 5-{micro}g {sup 252}Cf source emitting 10{sup 7} n/s to excite the atomic nuclei inside the item under test. The chemical elements inside the item are revealed by their characteristic gamma-ray spectrum, measured by a high-resolution high-purity germanium gamma-ray spectrometer. The system computer then infers the fill compound or mixture from the elemental data extracted from the gamma-ray spectrum. Reliable PINS assessments can be completed in as little as 100 s for favorable cases such as white phosphorus smoke munitions, but normally, a 1000 to 3000 live-second counting interval is required. To improve PINS throughput when hundreds or more munitions must be assessed, they are evaluating the possible advantages of 14-MeV neutron excitation over their current radioisotopic source.

• Research Organization: Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID (US)
• OSTI ID: 20093653
• Journal Information: Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 82; ISSN 0003-018X; ISSN TANSAO
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
CALIFORNIUM 252
CHEMICAL WARFARE AGENTS
COMPARATIVE EVALUATIONS
NEUTRON ACTIVATION ANALYSIS
NEUTRON SOURCES
PORTABLE EQUIPMENT
PROMPT GAMMA RADIATION