Metal-semiconductor, composite radiation detectors
In 1989, Naruse and Hatayama of Toshiba published a design for an increased efficiency x-ray detector. The design increased the efficiency of a semiconductor detector by interspersing layers of high-z metal within it. Semiconductors such as silicon make good, high-resolution radiation detectors, but they have low efficiency because they are low-z materials (z = 14). High-z metals, on the other hand, are good absorbers of high-energy photons. By interspersing high-z metal layers with semiconductor layers, Naruse and Hatayama combined the high absorption efficiency of the high-z metals with good detection capabilities of a semiconductor. This project is an attempt to use the same design to produce a high- efficiency gamma ray detector. By their nature, gamma rays require thicker metal layers to efficiently absorb them. These thicker layers change the behavior of the detector by reducing the resolution, compared to a solid state detector, and shifting the photopeak by a predictable amount. During the last year, we have modeled parts of the detector and have nearly completed a prototype device. 2 refs.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5833503
- Report Number(s):
- UCRL-ID-109159; ON: DE92008980
- Country of Publication:
- United States
- Language:
- English
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Metal-semiconductor, composite radiation detectors
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Related Subjects
360104 -- Metals & Alloys-- Physical Properties
360606 -- Other Materials-- Physical Properties-- (1992-)
440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
COMPOSITE MATERIALS
COMPUTERIZED SIMULATION
DETECTION
DOCUMENT TYPES
EFFICIENCY
ELEMENTS
ENERGY RESOLUTION
FUNCTIONAL MODELS
GAMMA DETECTION
GOLD
MATERIALS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
METALS
MONTE CARLO METHOD
PERFORMANCE
PROGRESS REPORT
RADIATION DETECTION
RADIATION DETECTORS
RESOLUTION
SEMICONDUCTOR DETECTORS
SEMIMETALS
SILICON
SIMULATION
TRANSITION ELEMENTS