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AbstractAbstract
[en] The odd-odd nucleus 74Br was gamma-spectroscopically studied via the reaction 58Ni(19F,2pnγ)74Br. Single γ-spectra, γ-excitation functions, γ-γ coincidences, γ-angular distributions, and mean life-times were measured by the recoil-distance method in coincidence with the neutron evaporated from the compound nucleus. The term scheme was extended by 14 new levels and 7 life-time assignments. For the measurement of parity changes a magnetic spectrometer of the 'Mini-Orange' type was constructed which works equally in coincidence with neutrons. By it in 74Br 8 conversion coefficients were measured. Calculations in a rotor-plus-2-quasiparticle model and calculations of the multiplet splitting of one-particle states of f, p, and g shells of this mass region permit a compared to the transition probabilities, sufficient interpretation of the most states 74Br in that way, that these different structures could be identified just as mixtures of collective and one-particle excitations. (orig.)
[de]
Der u-u-Kern 74Br wurde ueber die Reaktion 58Ni(19F,2pnγ)74Br gammaspektroskopisch untersucht. Es wurden γ-Einzelspektren, γ-Anregungsfunktionen, γ-γ-Koinzidenzen, γ-Winkelverteilungen und mittlere Lebensdauern nach der ''Recoil-Distance''-Methode jeweils in Koinzidenz mit dem vom Compoundkern abgedampften Neutron gemessen. Das Termschema wurde um 14 neue Niveaus und 7 Lebensdauerzuordnungen erweitert. Zur Messung von Paritaetsaenderungen wurde ein Magnetspektrometer vom Typ der ''Mini-Orange'' aufgebaut, das ebenfalls in Koinzidenz mit Neutronen arbeitet. Damit wurden im 74Br 8 Konversionskoeffizienten gemessen. Rechnungen in einem Rotator-plus-2 Quasiteilchen - Modell und Rechnungen der Multiplettaufspaltung von Einteilchenzustaenden der f-, p- und g-Schalen dieser Massengegend erlauben eine, gemessen an den Uebergangswahrscheinlichkeiten, befriedigende Interpretation der meisten Zustaende des 74Br in der Weise, dass diese verschiedenartigen Strukturen ebenso wie Mischungen aus kollektiven und Einteilchenanregungen identifiziert werden konnten. (orig.)Original Title
Teilchen-Multipletts und kollektive Anregungen im u-u-Kern 74Br
Primary Subject
Source
12 Feb 1983; 103 p; Diss. (D.Sc.).
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation; Numerical Data
Report Number
Country of publication
ANGULAR DISTRIBUTION, BROMINE 74, DE-EXCITATION, E2-TRANSITIONS, ELECTRON SPECTRA, ENERGY DEPENDENCE, ENERGY SPECTRA, EXCITATION FUNCTIONS, EXCITED STATES, EXPERIMENTAL DATA, FLUORINE 19 REACTIONS, GAMMA SPECTRA, HEAVY ION FUSION REACTIONS, K CONVERSION, LIFETIME, M1-TRANSITIONS, M2-TRANSITIONS, MEV RANGE 10-100, MIXING RATIO, NEUTRONS, NICKEL 58 TARGET, PARITY, PHOTONS, PROTONS, SPIN, STRENGTH FUNCTIONS
ANGULAR MOMENTUM, BARYONS, BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, BROMINE ISOTOPES, CATIONS, CHARGED PARTICLES, CONVERSION, DATA, DECAY, DISTRIBUTION, ELEMENTARY PARTICLES, ENERGY LEVELS, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, FERMIONS, FUNCTIONS, GAMMA DECAY, HADRONS, HEAVY ION REACTIONS, HYDROGEN IONS, HYDROGEN IONS 1 PLUS, INFORMATION, INTERMEDIATE MASS NUCLEI, INTERNAL CONVERSION, IONS, ISOTOPES, MASSLESS PARTICLES, MEV RANGE, MINUTES LIVING RADIOISOTOPES, MULTIPOLE TRANSITIONS, NUCLEAR DECAY, NUCLEAR REACTIONS, NUCLEI, NUCLEONS, NUCLEOSYNTHESIS, NUMERICAL DATA, ODD-ODD NUCLEI, PARTICLE PROPERTIES, RADIOISOTOPES, SPECTRA, SYNTHESIS, TARGETS
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