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Alpha-gamma decay studies of 255Rf, 251No and 247Fm |
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| Authors: | F P Heßberger S Hofmann D Ackermann S Antalic B Kindler I Kojouharov P Kuusiniemi M Leino B Lommel R Mann K Nishio A G Popeko B Sulignano S Saro B Streicher M Venhart A V Yeremin |
| Institution: | 1. Gesellschaft für Schwerionenforschung (GSI), D-64220, Darmstadt, Germany 2. Institut für Physik, Johann Wolfgang Goethe - Universit?t Frankfurt, D-60054, Frankfurt, Germany 3. Department of Physics, Comenius University Bratislava, SK-84248, Bratislava, Slovakia 4. Department of Physics, University of Jyv?skyl?, FIN-40014, Jyv?skyl?, Finland 5. Japan Atomic Energy Agency (JAEA), 319-1195, Tokai, Ibaraki, Japan 6. Flerov Laboratory of Nuclear Reactions, JINR, RUS-141890, Dubna, Russia 7. Institut für Kernchemie, Johannes Gutenberg-Universit?t, D-55099, Mainz, Germany |
| Abstract: | The decay of the isotopes 255Rf, 251No and 247Fm produced in the reactions
, and
was investigated by means of α-γ spectroscopy. Previously observed γ transitions in coincidence with α decays of 255Rf were confirmed, their energies and line intensities were measured more precisely, and their multipolarities were determined
as E1. In 251No a new isomeric state at E
* > 1700keV with a half-life of ≈ 2μs was identified. The decay of 247Fm was measured more precisely. A partial level scheme of the daughter nucleus 243Cf could be established. |
| Keywords: | 23 60 +e α decay 27 90 +b 220 ⩽ A 21 10 -k Properties of nuclei nuclear energy levels |
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