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High rate gamma spectroscopy system for activation analysis of short-lived isomeric transitions

Abstract

A high rate spectroscopy system specially suited for measurement of short-lived isomeric transitions is described, which, as part of a fast activation analysis facility at the TRIGA Mark II reactor, provides for automatic recording and immediate evaluation of gamma spectra taken from nuclides activated at stationary or pulsed reactor power. The system consists of a commercial de-coupled Ge(Li)-detector of 70 cm/sup 3/ modified for recycling operation for input rates in excess of 500000 c/s /sup 60/Co, a time variant trapezoidal shaping section and a fast constant dead-time ADC coupled to a programmed multichannel analyzer. Novel circuits for efficient pile-up rejection and time variant base line restoration extend the concept of gated integration up to count rates of more than 200000 c/s /sup 60/Co. Time-sequenced recording of spectra is performed by a minicomputer operated as a front-end processor of a larger laboratory computer, where final data processing takes place. New concepts for very simple and cost-effective implementation of multichannel analyzers by means of general purpose small computers are described.
Authors:
Westphall, G P [1] 
  1. Atominstitut der Oesterreichischen Hochschulen, Vienna
Publication Date:
Jul 15, 1976
Product Type:
Journal Article
Reference Number:
AIX-07-277686; EDB-77-031245
Resource Relation:
Journal Name: Nucl. Instrum. Methods; (Netherlands); Journal Volume: 136:2
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ACTIVATION ANALYSIS; DATA ACQUISITION SYSTEMS; ANALOG-TO-DIGITAL CONVERTERS; COMPUTERS; COUNTING RATES; DATA PROCESSING; ENERGY RESOLUTION; ENERGY-LEVEL TRANSITIONS; GAMMA SPECTRA; GAMMA SPECTROSCOPY; ISOMERIC NUCLEI; LI-DRIFTED GE DETECTORS; MULTI-CHANNEL ANALYZERS; PREAMPLIFIERS; PULSE PILEUP; AMPLIFIERS; CHEMICAL ANALYSIS; ELECTRONIC EQUIPMENT; GE SEMICONDUCTOR DETECTORS; LI-DRIFTED DETECTORS; MEASURING INSTRUMENTS; NUCLEI; PROCESSING; PULSE ANALYZERS; RADIATION DETECTORS; RESOLUTION; SEMICONDUCTOR DETECTORS; SPECTRA; SPECTROSCOPY; 400101* - Activation, Nuclear Reaction, Radiometric & Radiochemical Procedures
OSTI ID:
7338911
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: NUIMA
Submitting Site:
INIS
Size:
Pages: 271-283
Announcement Date:
Jan 01, 1977

Citation Formats

Westphall, G P. High rate gamma spectroscopy system for activation analysis of short-lived isomeric transitions. Netherlands: N. p., 1976. Web. doi:10.1016/0029-554X(76)90209-3.
Westphall, G P. High rate gamma spectroscopy system for activation analysis of short-lived isomeric transitions. Netherlands. doi:10.1016/0029-554X(76)90209-3.
Westphall, G P. 1976. "High rate gamma spectroscopy system for activation analysis of short-lived isomeric transitions." Netherlands. doi:10.1016/0029-554X(76)90209-3. https://www.osti.gov/servlets/purl/10.1016/0029-554X(76)90209-3.
@misc{etde_7338911,
title = {High rate gamma spectroscopy system for activation analysis of short-lived isomeric transitions}
author = {Westphall, G P}
abstractNote = {A high rate spectroscopy system specially suited for measurement of short-lived isomeric transitions is described, which, as part of a fast activation analysis facility at the TRIGA Mark II reactor, provides for automatic recording and immediate evaluation of gamma spectra taken from nuclides activated at stationary or pulsed reactor power. The system consists of a commercial de-coupled Ge(Li)-detector of 70 cm/sup 3/ modified for recycling operation for input rates in excess of 500000 c/s /sup 60/Co, a time variant trapezoidal shaping section and a fast constant dead-time ADC coupled to a programmed multichannel analyzer. Novel circuits for efficient pile-up rejection and time variant base line restoration extend the concept of gated integration up to count rates of more than 200000 c/s /sup 60/Co. Time-sequenced recording of spectra is performed by a minicomputer operated as a front-end processor of a larger laboratory computer, where final data processing takes place. New concepts for very simple and cost-effective implementation of multichannel analyzers by means of general purpose small computers are described.}
doi = {10.1016/0029-554X(76)90209-3}
journal = {Nucl. Instrum. Methods; (Netherlands)}
volume = {136:2}
journal type = {AC}
place = {Netherlands}
year = {1976}
month = {Jul}
}