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Contribution to the experimental study of excited levels of some light nuclei by using the method of angular correlation of internal conversion pairs and monopolar pairs; Contribution a l'etude experimentale de niveaux excites de quelques noyaux legers par la methode des Correlations angulaires des paires de conversion interne Et des paires monopolaires

Thesis/Dissertation:

Abstract

In a first part, the author presents a brief theory of angular correlations of internal conversion pairs and monopolar pairs, and indicates the complete formulations which are used to compute all the angular correlations corresponding to the performed experiments. In a second part, he describes a beta spectrometer, outlines factors which govern the energy resolving power, and the peculiarity of summation of two pulses proportional to the energy of the electron and positron which build up an internal pair. In a third part, the author reports experiments of angular correlations, indicates the shapes of monopolar spectra for different angles between electron and positron emission directions, determines the multipolarity of gamma radiations from the first excited levels of {sup 13}C and {sup 12}C, and gives the angular moments, parity and isobaric spin of two excited levels of the {sup 12}C [French] Dans la premiere partie de notre travail, nous exposons une theorie sommaire des correlations angulaires des paires de conversion interne et des paires monopolaires. A la fin de cette premiere partie sont indiquees les formules completes, qui nous ont servi a calculer pratiquement toutes les correlations angulaires correspondant a nos experiences. Dans la deuxieme partie, nous decrivons un spectrometre beta  More>>
Publication Date:
Jul 01, 1950
Product Type:
Thesis/Dissertation
Report Number:
FRNC-TH-8755
Resource Relation:
Other Information: 33 refs.; Available from the INIS Liaison Officer for France, see the 'INIS contacts' section of the INIS website for current contact and E-mail addresses: http://www.iaea.org/inis/Contacts/; These
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; ANGULAR CORRELATION; ATOMIC PHYSICS; BETA SPECTROMETERS; CALCULATION METHODS; CARBON 12; CARBON 13; COINCIDENCE CIRCUITS; ELECTROMAGNETIC FIELDS; ENERGY SPECTRA; ENERGY-LEVEL TRANSITIONS; EXCITED STATES; GAMMA RADIATION; HAMILTONIANS; INTERNAL CONVERSION; INTERNAL PAIR PRODUCTION; LIGHT NUCLEI; NUCLEAR PHYSICS; OXYGEN 16; PHOTOMULTIPLIERS; RESONANCE
OSTI ID:
22218732
Research Organizations:
Institut de Recherches Nucleaires de Strasbourg (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR1400713039698
Availability:
Available from INIS in electronic form
Submitting Site:
INIS
Size:
91 page(s)
Announcement Date:
Apr 18, 2014

Thesis/Dissertation:

Citation Formats

Armbruster, Raymond. Contribution to the experimental study of excited levels of some light nuclei by using the method of angular correlation of internal conversion pairs and monopolar pairs; Contribution a l'etude experimentale de niveaux excites de quelques noyaux legers par la methode des Correlations angulaires des paires de conversion interne Et des paires monopolaires. France: N. p., 1950. Web.
Armbruster, Raymond. Contribution to the experimental study of excited levels of some light nuclei by using the method of angular correlation of internal conversion pairs and monopolar pairs; Contribution a l'etude experimentale de niveaux excites de quelques noyaux legers par la methode des Correlations angulaires des paires de conversion interne Et des paires monopolaires. France.
Armbruster, Raymond. 1950. "Contribution to the experimental study of excited levels of some light nuclei by using the method of angular correlation of internal conversion pairs and monopolar pairs; Contribution a l'etude experimentale de niveaux excites de quelques noyaux legers par la methode des Correlations angulaires des paires de conversion interne Et des paires monopolaires." France.
@misc{etde_22218732,
title = {Contribution to the experimental study of excited levels of some light nuclei by using the method of angular correlation of internal conversion pairs and monopolar pairs; Contribution a l'etude experimentale de niveaux excites de quelques noyaux legers par la methode des Correlations angulaires des paires de conversion interne Et des paires monopolaires}
author = {Armbruster, Raymond}
abstractNote = {In a first part, the author presents a brief theory of angular correlations of internal conversion pairs and monopolar pairs, and indicates the complete formulations which are used to compute all the angular correlations corresponding to the performed experiments. In a second part, he describes a beta spectrometer, outlines factors which govern the energy resolving power, and the peculiarity of summation of two pulses proportional to the energy of the electron and positron which build up an internal pair. In a third part, the author reports experiments of angular correlations, indicates the shapes of monopolar spectra for different angles between electron and positron emission directions, determines the multipolarity of gamma radiations from the first excited levels of {sup 13}C and {sup 12}C, and gives the angular moments, parity and isobaric spin of two excited levels of the {sup 12}C [French] Dans la premiere partie de notre travail, nous exposons une theorie sommaire des correlations angulaires des paires de conversion interne et des paires monopolaires. A la fin de cette premiere partie sont indiquees les formules completes, qui nous ont servi a calculer pratiquement toutes les correlations angulaires correspondant a nos experiences. Dans la deuxieme partie, nous decrivons un spectrometre beta a scintillation. Nous insistons surtout sur les elements qui determinent le pouvoir de resolution en energie et sur la particularite de sommation de deux impulsions proportionnelles a l'energie de l'electron et du positron formant une paire interne. Dans la troisieme partie, nous exposons nos experiences de correlations angulaires. Nous avons repris une mesure precise de la correlation angulaire des paires monopolaires provenant du niveau 6,05 Mev de l'Oxygene 16. Il nous a ete egalement possible de donner l'allure des spectres monopolaires pour differents angles formes par les directions d'emission de l'electron et du positron. Nous avons determine par la methode des correlations angulaires des paires de conversion interne, la multipolarite des rayonnements gamma de 3,09 Mev (E1) et de 4,43 Mev (E2) provenant respectivement des premiers niveaux excites du {sup 13}C et du {sup 12}C. Enfin, nous donnons les moments angulaires, la parite et le spin isobarique de deux niveaux excites du {sup 12}C: 2{sup -}, T = 1 pour le niveau 16,57 Mev et 1{sup -}, T = 1 pour le niveau 17,22 Mev. (auteur)}
place = {France}
year = {1950}
month = {Jul}
}