München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 10: Kernphysik/Spektroskopie

HK 10.3: Vortrag

Montag, 20. März 2006, 17:15–17:30, C

Spin- and Parity-Resolved Level Densities from High-Resolution Hadron and Electron Scattering Experiments — •Y. Kalmykov¹, J. Carter², R.W. Fearick³, H. Fujita², Y. Fujita⁴, P. von Neumann-Cosel¹, I. Poltoratska¹, V.Yu. Ponomarev¹, A. Richter¹, A. Shevchenko¹, and J. Wambach¹ — ¹Institut für Kernphysik, Technische Universität Darmstadt — ²School of Physics, University of the Witwatersrand, South Africa — ³Physics Department, University of Cape Town, South Africa — ⁴Department of Physics, Osaka University, Japan

Modern experiments allow to unravel the fine structure of giant resonances even in heavy nuclei. High energy resolution along with excellent selectivity achieved by a proper choice of the kinematics give a possibility to extract spin- and parity-separated level densities by means of an autocorrelation analysis. A novel method [1] using the discrete wavelet transform provides a nearly model-independent determination of the non-resonant background which is crucial for the applicability of this technique. Results for 1⁺ states in ⁵⁸Cu and ⁹⁰Nb, 2⁻ states in ⁴⁸Ca, ⁵⁸Ni and ⁹⁰Zr as well as 2⁺ states in a broad range of nuclei are presented in comparison with the predictions of state-of-the-art theoretical models applied in astrophysical network calculations.
[1] Y. Kalmykov et al., Phys. Rev. Lett., in press.
^⋆ Supported by the DFG through SFB 634 and Ne 679/2-1.