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HK: Fachverband Physik der Hadronen und Kerne

HK 41: Kernphysik / Spektroskopie

HK 41.1: Gruppenbericht

Donnerstag, 13. März 2008, 16:30–17:00, 2G

Nuclear Structure of the Heaviest Nuclei: K-isomers and other Features — •D. Ackermann¹, F.P. Heßberger¹, S. Antalic², M. Block¹, S. Heinz¹, R.-D. Herzberg³, S. Hofmann^1,4, J. Khuyagbaatar^1,5, I. Kojouharov¹, R. Mann¹, K. Nishio⁶, B. Streicher², B. Sulignano¹, and M. Venhart² — ¹GSI, Darmstadt, Germany — ²Univ. Bratislava, Slovakia — ³Univ. Liverpool, United Kingdom — ⁴Univ. Frankfurt, Germany — ⁵Univ. St. Petersburg, Russia — ⁶JAEA, Tokai, Japan

The borderlines of the chart of nuclei are in the focus of interest of the nucear physics community. Ambitious projects to reach extreme isospin and to push towards the limits of stability are on the books of the funding agencies worldwide. New features of nuclear matter are expected under these extreme conditions. The quantum mechanical properties and the evolution of the shell model will be probed. In our endeavour to approach the predicted "island of stability" at Z=114, 120 or 126 and N=184 we performed, apart from the search for new elements, also nuclear structure studies for heaviest nuclei. The isomeric states that we recently observed in ²⁵²No and ²⁷⁰Ds are only two examples of the many facets of interesting physics to be discovered in this region. Systematic investigation of the nuclear structure is also essential for a successful progress in element synthesis. In radioactive decay studies, i.e. evaporation residue (ER)-α-γ coincidences of ERs implanted into a Si detector after a separator, we studied features like K-isomerism and the trend of single particle levels in isotopic and isotonic chains in the region of Z = 100 (fermium) to 110 (darmstadtium).