Behaviour of 144Gd at very high angular momentum. Study of the continuum
Description
The specific physical concepts that dictated the choice of 144Gd for the present high spin study are presented in the first part of this work. The second part describes the various formalisms and techniques used to extract the multiplicities, multipolarities and moments of inertia from continuous γ ray spectra. The third part relates the results of the quasi-continuum γ ray of 144Gd formed in the fusion-evaporation reaction 120Sn(28Si, 4nγ) with four bombarding energies. A detailed balance of energy and angular momentum of the compound nucleus desexcitation has been given. Finally the evolution of the nuclear shape as a function of spin has been determined from the experimental data and interpreted by a combined micro and macroscopic theoretical calculations using a Woods-Saxon potential
Availability note (English)
MF available from INIS under the Report Number.Abstract (French)
Les concepts physiques specifiques a l'etude des comportements des noyaux atomiques a haut moment angulaire et qui ont dicte le choix du noyau 144Gd sont exposes dans la premiere partie de ce travail. La seconde partie concerne les divers formalismes et techniques utilisees pour extraire a partir des spectres continus γ des quantites observables: multiplicite, multipolarite et les moments d'inertie. La troisieme partie relate les resultats experimentaux de l'analyse du quasi-continuum γ du noyau 144Gd crees dans la reaction de fusion evaporation 120Sn(28Si,4nγ) a quatre energies de bombardement. Un bilan detaille en energie et en moment angulaire de la cascade de desexcitation du noyau compose forme a ete fait. Enfin l'evolution de forme du noyau en fonction du spin, evolution caracterisee par les quantites experimentales determinees, est interpretee par des calculs theoriques, conciliant des aspects microscopique et macroscopique de la matiere nucleaire et utilisant un potentiel de Woods-SaxonFiles
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Additional details
Additional titles
- Original title (French)
- Comportement du noyau
Publishing Information
- Imprint Pagination
- 137 p.
- Report number
- CRN-PN--84-28
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 16044420
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- ANGULAR CORRELATION; ANGULAR DISTRIBUTION; ANGULAR MOMENTUM; CRANKING MODEL; GADOLINIUM 144; GAMMA SPECTRA; GAMMA SPECTROSCOPY; HEAVY ION FUSION REACTIONS; HIGH SPIN STATES; LIQUID DROP MODEL; MEV RANGE 100-1000; MOMENT OF INERTIA; MULTIPLICITY; MULTIPOLARITY; ROTATIONAL STATES; SILICON 28 REACTIONS; STRUTINSKY THEORY; TIN 120 TARGET; WOODS-SAXON POTENTIAL
- Descriptors DEC
- BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CORRELATIONS; DISTRIBUTION; ENERGY LEVELS; ENERGY RANGE; EVEN-EVEN NUCLEI; EXCITED STATES; GADOLINIUM ISOTOPES; HEAVY ION REACTIONS; INTERMEDIATE MASS NUCLEI; ISOTOPES; MATHEMATICAL MODELS; MEV RANGE; NUCLEAR MODELS; NUCLEAR POTENTIAL; NUCLEAR REACTIONS; NUCLEI; NUCLEOSYNTHESIS; POTENTIALS; RADIOISOTOPES; RARE EARTH NUCLEI; SPECTRA; SPECTROSCOPY; SYNTHESIS; TARGETS