Köln 2004 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 34: Nuclear and Particle Astrophysics II

HK 34.9: Vortrag

Mittwoch, 10. März 2004, 16:15–16:30, F

Measurement of polarization-transfer coefficients of the fusion reaction D(d^→,p^→ )³H at low energies — •Astrid Imig, Carsten Düweke, Jürgen Ley, and Hans Paetz gen. Schieck — IKP, Universität zu Köln

Understanding the four-nucleon system is of fundamental importance. The low-energy observables of the DD reactions are especially interesting in the context of fusion-energy and astrophysical considerations. amplitudes By factoring out the Coulomb penetrabilities one is able to determine all transition amplitudes with a minimum of model-dependent assumptions. Thus, it is possible to predict arbitrary observables [1]. However, in the data base observables such as polarization-transfer coefficients PTC are missing. Therefore, in order to measure these, we have installed a double-scattering experiment directly behind the polarized ion source. There are many experimental challenges in the determination of PTC, i.e. due to double scattering and a strongly decreasing cross section. Together with a new data acquisition system we are now able to run experiments in parallel to other measurements using the Cologne FN tandem accelerator. Thus, we plan to run continously for long periods and to obtain sufficient statistics in reasonable time.
Supported by the DFG, contract PA 488/7-1

[1] O. Geiger et al., Nucl. Phys. A586 (1995) 140-150