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HK: Physik der Hadronen und Kerne

HK 10: Poster Session: Nuclear Structure/Spectroscopy

HK 10.21: Poster

Dienstag, 9. März 2004, 13:30–15:30, Foyer

Two Neutron Transfer Reactions with ¹⁰Be Targets* — •W. Schwerdtfeger¹, C. Alvarez¹, B. Bruyneel², T. Faestermann³, R. Gernhäuser³, D. Habs¹, T. Kröll³, R. Krücken³, M. Lauer⁴, R. Lutter¹, M. Mahgoub³, H.J. Maier¹, T. Morgan¹, M. Münch³, O. Niedermaier⁴, P. Reiter², o. Schaile¹, H. Scheit⁴, P. Thirolf¹, W. von Oertzen⁵, N. Warr², and H. Wolter¹ — ¹Sektion Physik, Ludwig Maximilians Universität München — ²Institut für Kernphysik, Köln — ³E12, Technische Universität München — ⁴Max Plank Institut, Heidelberg — ⁵Hahn Meitner Institut, Berlin

Transfer reactions enable to investigate the shape coexistence of e.g. deformed and spherical 0⁺ states in Mg isotopes around the island of inversion at N ≈ 20. 2n transfer reactions from a radioactive ¹⁰Be target provide a distinct trigger via the two α particles ejected from the intermediate ⁸Be reaction product. The ¹⁰Be targets (t_1/2 = 1.6 · 10⁶ a) with a thickness of ≈ 110 µ g/cm² were produced by a micro-evaporation module onto a carbon backing of ≈ 40 µ g/cm². In order to estimate the cross section of the 2n transfer ¹⁰Be(³⁰Mg,³²Mg)⁸Be, which is intended to be performed at REX-ISOLDE, the preparatory reaction ¹⁰Be(²⁶Mg,²⁸Mg)⁸Be has been studied at the MINIBALL γ-spectrometer in Cologne. For a better understanding theoretical DWBA-calculations using the Coupled-Channel Code FRESCO [1] have been performed. *Supported by DFG under contract number HA 1101/6-3

[1] I.J. Thompson, Comp. Phys. Rep. 7 (1987) pp 167-212