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Mittag, C.; Fernandez-Niello, J.; Puchta, H.; Riess, F.; Roy, N.; Decman, D.J.; Kluge, H.; Maier, K.H.; Maj, A.
Hahn-Meitner-Institut fuer Kernforschung Berlin G.m.b.H. (Germany, F.R.). Bereich Kern- und Strahlenphysik1983
Hahn-Meitner-Institut fuer Kernforschung Berlin G.m.b.H. (Germany, F.R.). Bereich Kern- und Strahlenphysik1983
AbstractAbstract
[en] The high-spin level structure of 217Ra has been established up to a spin of (47/2) by means of in-beam γ-ray and conversion electron spectroscopy with (sup(12,13)C,xn) reactions on 208,Pb. Positive-parity levels up to 27/2+ and negative-parity states up to (31/2-) can be qualitatively understood in terms of neutron excitations arising out of shell model configurations νg3sub(9/2), νg2sub(9/2) isub(11/2) and νg2sub(9/2) jsub(15/2). The isomeric state at 2.4 MeV and the levels above it require both neutron and proton excitations. The E1 transitions between the negative parity and the ν3sub(9/2) states suggest the presence of octupole deformed configurations. Shell model calculations provide only a qualitative description of the levels. The experimental level spacings and their moderate agreement with the calculated ones suggest also the onset of deformation and of collective vibrational characteristics. (orig.)
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1983; 38 p
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Report
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ANGULAR DISTRIBUTION, BRANCHING RATIO, CARBON 12 REACTIONS, CARBON 13 REACTIONS, DE-EXCITATION, E1-TRANSITIONS, E2-TRANSITIONS, ELECTRON SPECTRA, ENERGY SPECTRA, ENERGY-LEVEL DENSITY, EXCITATION FUNCTIONS, EXPERIMENTAL DATA, GAMMA SPECTRA, HALF-LIFE, HEAVY ION FUSION REACTIONS, HIGH SPIN STATES, ISOMERIC NUCLEI, K CONVERSION, L CONVERSION, LEAD 208 TARGET, M1-TRANSITIONS, MEV RANGE 10-100, MICROSEC LIVING RADIOISOTOPES, NEUTRONS, NUCLEAR DEFORMATION, PARITY, PHOTONS, RADIUM 217, ROTATIONAL STATES, SHELL MODELS, SPIN, VIBRATIONAL STATES
ANGULAR MOMENTUM, BARYONS, CONVERSION, DATA, DECAY, DEFORMATION, DISTRIBUTION, ELEMENTARY PARTICLES, ENERGY LEVELS, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, EVEN-ODD NUCLEI, EXCITED STATES, FERMIONS, GAMMA DECAY, HADRONS, HEAVY ION REACTIONS, HEAVY NUCLEI, INFORMATION, INTERNAL CONVERSION, ISOTOPES, MASSLESS PARTICLES, MATHEMATICAL MODELS, MEV RANGE, MULTIPOLE TRANSITIONS, NUCLEAR DECAY, NUCLEAR MODELS, NUCLEAR REACTIONS, NUCLEI, NUCLEONS, NUCLEOSYNTHESIS, NUMERICAL DATA, PARTICLE PROPERTIES, RADIOISOTOPES, RADIUM ISOTOPES, SPECTRA, SYNTHESIS, TARGETS
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