Darmstadt 2008 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 34: Postersitzung
HK 34.88: Poster
Donnerstag, 13. März 2008, 14:00–16:00, Poster C3
Production of New Neutron Deficient Fm Isotopes and Nuclear Structure Investigation — •Jadambaa Khuyagbaatar1,2, Sigurd Hofmann1,3, Fritz Peter Heßberger1, Dieter Ackermann1, Stanislav Antalic4, Sophie Heinz1, Birgit Kindler1, Ivan Kojouharov1, Bettina Lommel1, Rido Mann1, Katsuhisa Nishio5, and Yuri Novikov2 — 1Gesellschaft für Schwerionenforschung GSI, Darmstadt, Germany — 2St. Petersburg State University, St. Petersburg, Russia — 3Johann Wolfgang Goethe-Universität, Frankfurt, Germany — 4Comenius University, Bratislava, Slovakia — 5Japan Atomic Energy Agency JAEA, Tokai, Japan
The synthesis of the heaviest nuclei and measurements of their production and decay properties (cross sections, most intense α transitions, spontaneous fission (sf) branching ratios, half-lives, etc.) delivers basic data for understanding the formation processes and properties of nuclei at the limits determined by the interplay of nuclear and Coulomb forces. Of special interest is the region of nuclei around Z = 100 and N = 152, where large energy gaps between single particle levels result in increased stability for deformed nuclei. Detailed knowledge of the single particle levels and their ordering is a need for the assessment of the reliability of theoretical models which are also aiming at predicting properties of superheavy nuclei expected at Z = 114, 120 or 126 and N = 184. To produce the neutron deficient isotopes 243,244,245Fm and previously unknown ones 241,242Fm we used the reactions 40Ar + 204,206,207,208Pb. We were able to observe the low lying level structure of their daughter Cf and Cm isotopes via α-α and α-γ correlations.