Si(Li) detectors with thin dead layers for low energy x-ray detection
Conference
·
OSTI ID:5632920
Regions of incomplete charge collection, or dead layers'', are compared for Si(Li) detectors fabricated with Au and Pd entrance window electrodes. The dead layers were measured by characterizing the detector spectral response to x-ray energies above and below the Si K{alpha} absorption edge. It was found that Si(Li) detectors with Pd electrodes exhibit consistently thinner effective Si dead layers than those with Au electrodes. Furthermore, it is demonstrated that the minimum thickness required for low resistivity Pd electrodes is thinner than that required for low resistivity Au electrodes, which further reduces the signal attenuation in Pd/Si(Li) detectors. A model, based on Pd compensation of oxygen vacancies in the SiO{sub 2} at the entrance window Si(Li) surface, is proposed to explain the observed differences in detector dead layer thickness. Electrode structures for optimum Si(Li) detector performance at low x-ray energies are discussed. 18 refs., 8 figs., 1 tab.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5632920
- Report Number(s):
- LBL-29061; CONF-9010220--29; ON: DE91011875
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
440100* -- Radiation Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ABSORPTION
CHARGE COLLECTION
DATA
DETECTION
DIFFUSION
DIMENSIONS
EFFICIENCY
ELECTRODES
ELEMENTS
EXPERIMENTAL DATA
FUNCTIONS
GOLD
INFORMATION
K ABSORPTION
LI-DRIFTED DETECTORS
LI-DRIFTED SI DETECTORS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
METALS
NUMERICAL DATA
PALLADIUM
PERFORMANCE
PLATINUM METALS
RADIATION DETECTION
RADIATION DETECTORS
RESPONSE FUNCTIONS
SEMICONDUCTOR DETECTORS
SEMIMETALS
SI SEMICONDUCTOR DETECTORS
SILICON
THICKNESS
TRANSITION ELEMENTS
X-RAY DETECTION
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ABSORPTION
CHARGE COLLECTION
DATA
DETECTION
DIFFUSION
DIMENSIONS
EFFICIENCY
ELECTRODES
ELEMENTS
EXPERIMENTAL DATA
FUNCTIONS
GOLD
INFORMATION
K ABSORPTION
LI-DRIFTED DETECTORS
LI-DRIFTED SI DETECTORS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
METALS
NUMERICAL DATA
PALLADIUM
PERFORMANCE
PLATINUM METALS
RADIATION DETECTION
RADIATION DETECTORS
RESPONSE FUNCTIONS
SEMICONDUCTOR DETECTORS
SEMIMETALS
SI SEMICONDUCTOR DETECTORS
SILICON
THICKNESS
TRANSITION ELEMENTS
X-RAY DETECTION