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The importance of the time scale in radiation detection exemplified by comparing conventional and avalache semiconductor detectors

Abstract

The profound importance of the time scale of a radiation detection process is discussed in an analysis of limitations in energy resolution and timing, with emphasis on semiconductor detectors used for X-ray detection. The basic event detection time involves stopping of the particle and creating a distribution of free electrons and holes containing all desired information (energy, time position) about the particle or quantum, in a time approximately equal to 10/sup -12/s. The process of extracting this information usually involves a much longer time because the signal is generated in the relatively slow process of charge collection, and further prolongation may be caused by signal processing required to depress noise for improving energy resolution. This is a common situation for conventional semiconductor detectors with external amplifiers where time constants of 10/sup -5/-10/sup -4/s may be optimum, primarily because of amplifier noise. A different situation applies to the avalanche detector where internal amplification helps in suppressing noise without expanding the time scale of detections, resulting in an optimum time of 10/sup -9/-10/sup -8/s. These two cases are illustrated by plotting energy resolution vs. time constant, for different magnitudes of the parallel and series type noise sources. The effects of the inherent  More>>
Authors:
Tove, P A; Cho, Z H; Huth, G C [1] 
  1. California Univ., Los Angeles (USA). Lab. of Nuclear Medicine and Radiation Biology
Publication Date:
Feb 01, 1976
Product Type:
Journal Article
Reference Number:
AIX-07-245179; EDB-76-076344
Resource Relation:
Journal Name: Phys. Scr.; (Sweden); Journal Volume: 13:2
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; SEMICONDUCTOR DETECTORS; TIMING PROPERTIES; ACCURACY; CHARGE COLLECTION; COMPARATIVE EVALUATIONS; ENERGY RESOLUTION; NOISE; PERFORMANCE; RADIATION DETECTION; X-RAY DETECTION; MEASURING INSTRUMENTS; RADIATION DETECTORS; RESOLUTION; 440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments
OSTI ID:
7179451
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: PHSTB
Submitting Site:
INIS
Size:
Pages: 83-92
Announcement Date:

Citation Formats

Tove, P A, Cho, Z H, and Huth, G C. The importance of the time scale in radiation detection exemplified by comparing conventional and avalache semiconductor detectors. Sweden: N. p., 1976. Web. doi:10.1088/0031-8949/13/2/003.
Tove, P A, Cho, Z H, & Huth, G C. The importance of the time scale in radiation detection exemplified by comparing conventional and avalache semiconductor detectors. Sweden. doi:10.1088/0031-8949/13/2/003.
Tove, P A, Cho, Z H, and Huth, G C. 1976. "The importance of the time scale in radiation detection exemplified by comparing conventional and avalache semiconductor detectors." Sweden. doi:10.1088/0031-8949/13/2/003. https://www.osti.gov/servlets/purl/10.1088/0031-8949/13/2/003.
@misc{etde_7179451,
title = {The importance of the time scale in radiation detection exemplified by comparing conventional and avalache semiconductor detectors}
author = {Tove, P A, Cho, Z H, and Huth, G C}
abstractNote = {The profound importance of the time scale of a radiation detection process is discussed in an analysis of limitations in energy resolution and timing, with emphasis on semiconductor detectors used for X-ray detection. The basic event detection time involves stopping of the particle and creating a distribution of free electrons and holes containing all desired information (energy, time position) about the particle or quantum, in a time approximately equal to 10/sup -12/s. The process of extracting this information usually involves a much longer time because the signal is generated in the relatively slow process of charge collection, and further prolongation may be caused by signal processing required to depress noise for improving energy resolution. This is a common situation for conventional semiconductor detectors with external amplifiers where time constants of 10/sup -5/-10/sup -4/s may be optimum, primarily because of amplifier noise. A different situation applies to the avalanche detector where internal amplification helps in suppressing noise without expanding the time scale of detections, resulting in an optimum time of 10/sup -9/-10/sup -8/s. These two cases are illustrated by plotting energy resolution vs. time constant, for different magnitudes of the parallel and series type noise sources. The effects of the inherent energy spread due to statistips and spatial inhomogeneities are also discussed to illustrate the potential of these two approaches for energy and time determination. Two constructional approaches for avalanche detectors are briefly compared.}
doi = {10.1088/0031-8949/13/2/003}
journal = {Phys. Scr.; (Sweden)}
volume = {13:2}
journal type = {AC}
place = {Sweden}
year = {1976}
month = {Feb}
}