Köln 2004 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 10: Poster Session: Nuclear Structure/Spectroscopy
HK 10.12: Poster
Tuesday, March 9, 2004, 13:30–15:30, Foyer
High Resolution γ Spectroscopy at the Big Bite Spectrometer* — •K. Lindenberg1, D. Savran1, A. M. van den Berg2, P. Dendooven2, M. Harakeh2, S. de Jong2, A. Matic2, A. Mol2, H. Wörtche2, and A. Zilges1 — 1Institut für Kernphysik, Technische Universität Darmstadt, Germany — 2Kernfysisch Versneller Instituut, Groningen, The Netherlands
We plan to study electric-dipole excitations below the particle threshold in the magic nuclei 48Ca and 138Ba by means of the (α, α′ γ) reaction at 120 MeV incident energy at the KVI in Groningen. Compared to the pioneering experiment using NaI detectors for the detection of the γ-rays[1], we will use five highly efficient high resolution Ge(HP) detectors with active BGO shields in conjunction with the BBS[3]. Therefore, a resolution better than 10 keV for the detection of γ-energies in the excitation region of interest will become feasible. The identification of the isospin character of low-lying excitations will provide the testing ground for numerous, partly contradicting theoretical descriptions[2]. An improved understanding of these excitations will have an important impact on the description of nucleosynthesis in explosive stellar burning phases. * supported by the DFG (SFB 634) and the European Commission under contract HPRI-CT-1999-00109
[1] D. Poelhekken et al., Phys. Lett. B 278 (1992) 423.
[2] A. Zilges et al., Phys. Lett. B 542 (2002) 43.
[3] A. M. van den Berg, Nucl. Instr. Meth. Phys. Res. B 99 (1995) 637.