Test results of a new detector system for gamma ray isotopic measurements

Conference · Sun Aug 01 00:00:00 EDT 1993

OSTI ID:10180440

Malcom, J E; Bonner, C A; Hurd, J R ^[1]; Fleissner, ^[2]

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1. Los Alamos National Lab., NM (United States)
2. EG and G Rocky Flats, Inc., Golden, CO (United States)

A new type of gamma-ray detector system for isotopic measurements has been developed. This new system, a ``Duo detector`` array, consists of two intrinsic germanium detectors, a planar followed by a coaxial mounted on the same axis within a single cryostat assembly. This configuration allows the isotopic analysis system to take advantage of spectral data results that are collected simultaneously from different gamma-ray energy regimes. Princeton Gamma Tech (PGT) produced several prototypes of this Duo detector array which were then tested by Rocky Flats personnel until the design was optimized. An application for this detector design is in automated, roboticized NDA systems such as those being developed at the Los Alamos TA-55 Plutonium Facility. The Duo detector design reduces the space necessary for the isotopic instrument by a factor of two (only one liquid nitrogen dewar is needed), and also reduces the complexity of the mechanical systems and controlling software. Data will be presented on measurements of nuclear material with a Duo detector for a wide variety of matrices. Results indicate that the maximum count rate can be increased up to 100,000 counts per second yet maintaining excellent resolution and energy rate product.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 10180440
• Report Number(s): LA-UR-93-2607; CONF-930749-43; ON: DE93018541; TRN: 93:019927
• Resource Relation: Conference: 34. annual meeting of the Institute of Nuclear Materials Management,Scottsdale, AZ (United States),18-21 Jul 1993; Other Information: PBD: [1993]
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
GAMMA SPECTROMETERS
TESTING
PLUTONIUM
ISOTOPE RATIO
GAMMA DETECTION
GE SEMICONDUCTOR DETECTORS
NUCLEAR MATERIALS MANAGEMENT
440103
055001
NUCLEAR SPECTROSCOPIC INSTRUMENTATION
TECHNICAL ASPECTS