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AbstractAbstract
[en] The γ-decay from the evaporation residues formed in the 50Ti + 50Ti → 100Rusup(*) and 50Ti + 110Pd → 160Ersup(*) reactions with angular momentum up to the maximum these systems can sustain, has been studied utilizing a sum spectrometer in coincidence with two smaller NaI detectors. The excitation energy and average angular momentum are determined as a function of γ-ray cascade energy. Simultaneously, the structure of the γ-ray continuum and its multipolarity is obtained as a function of these two correlated parameters. From the centroid energy of quadrupole transitions between states confined to a narrow spin region an effective moment of inertia is extracted. For the products of the 100Ru compound system a large deformation, is indicated by a moment of inertia as large as 1.3 times the spherical rigid-body value for I approx. > 40 h/2π. This is considerably lower in angular momentum than the transition to triaxial shape predicted for a rotating liquid drop. The moment of inertia for the residues of the 160Er compound system is 5-15% larger than the spherical rigid body value. For both systems studied a considerable part of the decay is due to dipole transitions of rather low energy (< 1 MeV) even at the highes spins where a quadrupole bump is well developed. (orig.)
Primary Subject
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Nuclear Physics. A; ISSN 0375-9474;
; v. 361(1); p. 242-274

Country of publication
BETA DECAY RADIOISOTOPES, DATA, DAYS LIVING RADIOISOTOPES, DECAY, DEFORMATION, ELECTRON CAPTURE RADIOISOTOPES, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, ERBIUM ISOTOPES, EVEN-EVEN NUCLEI, HEAVY ION REACTIONS, INFORMATION, INTERMEDIATE MASS NUCLEI, ISOTOPES, MEV RANGE, NUCLEAR CASCADES, NUCLEAR DECAY, NUCLEAR REACTIONS, NUCLEI, NUCLEOSYNTHESIS, NUMERICAL DATA, RADIOISOTOPES, RARE EARTH NUCLEI, RUTHENIUM ISOTOPES, SPECTRA, STABLE ISOTOPES, TARGETS
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