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Data processing in gamma spectrometry. Application to the decay schemes study; Traitement des informations en spectrometrie gamma application a l'etude de schemas de desintegration

Abstract

The purpose of this thesis is the processing of the data issued from a gamma spectrometer, and its applications to the decay schemes study. The mathematical analysis of the full energy peaks, in connection with the very good resolution of semi-conductor detectors, leads to a very accurate determination of the energies. The resolution of complex spectra by the least squares method, completed by a spectra generating process, allows the calculation of branching ratios. Then, the handling of the two dimensional experiments permits the coincidence exam. For each of these methods, the calculation principle, then the systematics tests realized in order to prove their validity and to determine their application ranges as well as some experimental results appropriate to illustrate their possibilities, are presented. The energies of some nuclides, frequently used as standards have been thus measured and the decay schemes of {sup 134}Cs and {sup 110m}Ag determined precisely. (author) [French] Cette these est consacree aux methodes de traitement des informations issues d'un spectrometre {gamma}, et a leur application a l'etude des schemas de desintegration: l'analyse mathematique des pics d'absorption totale, conjuguee avec l'excellent pouvoir de resolution des detecteurs semi-conducteurs, conduit a une determination tres precise des energies. La decomposition des  More>>
Authors:
Boulanger, J P [1] 
  1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires, departement d'electronique generale, service d'instrumentation nucleaire
Publication Date:
Jun 01, 1968
Product Type:
Thesis/Dissertation
Report Number:
CEA-R-3590
Resource Relation:
Other Information: TH: These docteur es sciences; 50 refs; PBD: Jun 1969; Jun 1968
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ABSORPTION SPECTRA; ANGULAR CORRELATION; BRANCHING RATIO; CESIUM 134; COINCIDENCE SPECTROMETRY; CORRECTIONS; DATA COVARIANCES; DATA PROCESSING; ENERGY-LEVEL TRANSITIONS; GAMMA SPECTRA; GAMMA SPECTROSCOPY; GOLD 198; GOLD 199; INTERPOLATION; LEAST SQUARE FIT; MANGANESE 54; MIXTURES; NUCLEAR DECAY; PEAKS; QUANTITATIVE CHEMICAL ANALYSIS; RESOLUTION; SCANDIUM 46; SILVER 110; ZIRCONIUM 95
OSTI ID:
20523373
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France); Faculte des Sciences d'Orsay, Universite de Paris, 91 (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR04R3590091428
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
[256] pages
Announcement Date:

Citation Formats

Boulanger, J P. Data processing in gamma spectrometry. Application to the decay schemes study; Traitement des informations en spectrometrie gamma application a l'etude de schemas de desintegration. France: N. p., 1968. Web.
Boulanger, J P. Data processing in gamma spectrometry. Application to the decay schemes study; Traitement des informations en spectrometrie gamma application a l'etude de schemas de desintegration. France.
Boulanger, J P. 1968. "Data processing in gamma spectrometry. Application to the decay schemes study; Traitement des informations en spectrometrie gamma application a l'etude de schemas de desintegration." France.
@misc{etde_20523373,
title = {Data processing in gamma spectrometry. Application to the decay schemes study; Traitement des informations en spectrometrie gamma application a l'etude de schemas de desintegration}
author = {Boulanger, J P}
abstractNote = {The purpose of this thesis is the processing of the data issued from a gamma spectrometer, and its applications to the decay schemes study. The mathematical analysis of the full energy peaks, in connection with the very good resolution of semi-conductor detectors, leads to a very accurate determination of the energies. The resolution of complex spectra by the least squares method, completed by a spectra generating process, allows the calculation of branching ratios. Then, the handling of the two dimensional experiments permits the coincidence exam. For each of these methods, the calculation principle, then the systematics tests realized in order to prove their validity and to determine their application ranges as well as some experimental results appropriate to illustrate their possibilities, are presented. The energies of some nuclides, frequently used as standards have been thus measured and the decay schemes of {sup 134}Cs and {sup 110m}Ag determined precisely. (author) [French] Cette these est consacree aux methodes de traitement des informations issues d'un spectrometre {gamma}, et a leur application a l'etude des schemas de desintegration: l'analyse mathematique des pics d'absorption totale, conjuguee avec l'excellent pouvoir de resolution des detecteurs semi-conducteurs, conduit a une determination tres precise des energies. La decomposition des spectres complexes par la methode des moindres carres, completee par un procede de generation de spectres, autorise le calcul des rapports de branchement. Enfin le depouillement des experiences biparametriques permet l'examen des coincidences. Pour chacune de ces methodes, on expose le principe des calculs et les essais systematiques effectues afin d'eprouver leur validite et de definir leurs domaines d'application, ainsi que quelques resultats experimentaux propres a illustrer leurs possibilites. Les energies de quelques isotopes utilises couramment comme etalons ont ainsi ete mesurees, et les schemas de desintegration du {sup 134}Cs et de l'{sup 110m}Ag precises. (auteur)}
place = {France}
year = {1968}
month = {Jun}
}