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Decman, D.J.; Grawe, H.; Kluge, H.; Maier, K.H.; Maj, A.; Roy, N.; Agarwal, Y.K.; Blume, K.P.; Guttormsen, M.; Huebel, H.; Recht, J.
Hahn-Meitner-Institut fuer Kernforschung Berlin G.m.b.H. (Germany, F.R.)1984
Hahn-Meitner-Institut fuer Kernforschung Berlin G.m.b.H. (Germany, F.R.)1984
AbstractAbstract
[en] The nucleus 217Ac was studied using the 205Tl(16O, 4n), 206Pb (15N, 4n) and 209Bi (12C, 4n) reactions. The measurements included α-γ, γ-γ, α-ce and ce-ce coincidence experiments as well as γ-ray and α-particle perturbed angular distribution studies. Results are: g(217Acsup(gs))=+0.85 (1) and Tsub(1/2)(217Acsup(gs))=69(4) ns, the shortest known α-decay of a ground state. 217Agsup(m) decays mainly by a γ cascade, but also by α-emission to the single particles states πhsub(9/2), fsub(7/2), isub(13/2) of 213Fr. Spins and parities of levels to the 29/2+ isomer at 2013 keV with Tsub(1/2)=740(40)ns and g=+0.347(5) are determined. The level scheme of 217Ac and the α decay of N=128 isotones are discussed. (orig.)
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1984; 64 p
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Report
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ACTINIUM 217, ALPHA DECAY, ALPHA PARTICLES, ANGULAR DISTRIBUTION, BISMUTH 209 TARGET, BRANCHING RATIO, CARBON 12 REACTIONS, COINCIDENCE SPECTROMETRY, ELECTRONS, ENERGY SPECTRA, EXPERIMENTAL DATA, GAMMA CASCADES, GAMMA RADIATION, GROUND STATES, GYROMAGNETIC RATIO, HALF-LIFE, HEAVY ION FUSION REACTIONS, HIGH SPIN STATES, INTERNAL CONVERSION, ISOMERIC NUCLEI, LEAD 206 TARGET, LEVEL WIDTHS, MAGNETIC DIPOLE MOMENTS, MEV RANGE 10-100, NANOSEC LIVING RADIOISOTOPES, NEUTRONS, NITROGEN 15 REACTIONS, NUCLEAR MAGNETIC MOMENTS, OXYGEN 16 REACTIONS, PARITY, ROTATIONAL STATES, SPIN, THALLIUM 205 TARGET
ACTINIDE NUCLEI, ACTINIUM ISOTOPES, ALPHA DECAY RADIOISOTOPES, ANGULAR MOMENTUM, BARYONS, CHARGED PARTICLES, COINCIDENCE METHODS, CONVERSION, COUNTING TECHNIQUES, DATA, DECAY, DIPOLE MOMENTS, DISTRIBUTION, ELECTROMAGNETIC RADIATION, ELEMENTARY PARTICLES, ENERGY LEVELS, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, EXCITED STATES, FERMIONS, HADRONS, HEAVY ION REACTIONS, HEAVY NUCLEI, HELIUM IONS, INFORMATION, IONIZING RADIATIONS, IONS, ISOTOPES, LEPTONS, MAGNETIC MOMENTS, MEV RANGE, NUCLEAR CASCADES, NUCLEAR DECAY, NUCLEAR PROPERTIES, NUCLEAR REACTIONS, NUCLEI, NUCLEONS, NUCLEOSYNTHESIS, NUMERICAL DATA, ODD-EVEN NUCLEI, PARTICLE PROPERTIES, RADIATIONS, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES, SPECTRA, SYNTHESIS, TARGETS
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