Köln 2004 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 11: Poster Session: Electromagnetic and Hadronic Probes
HK 11.34: Poster
Dienstag, 9. März 2004, 13:30–15:30, Foyer
Nucleon Polarizabilities from Low-Energy Compton Scattering∗ — •O. Yevetska1, J. Ahrens2, V. Chizhov3, V. Iatsioura3, A. Richter1, G. Schrieder1, L. Sergeev3, Yu. Smirenin3, and S. Watzlawik1 — 1Institut für Kernphysik, TU Darmstadt, Germany — 2Institut für Kernphysik, Johannes Gutenberg-Universität, Mainz, Germany — 3Petersburg Nuclear Physics Institute, Petersburg, Russia
At the superconducting Darmstadt electron linear accelerator S-DALINAC an experiment is built up to measure the electric and magnetic polarizability of the nucleon with low energy Compton scattering. A new experimental method will be used for determination of the energy dependence of the differential cross section of elastic γ p scattering in a model-independent way in the energy range of bremsstrahlung photons of 20 - 120 MeV with a precision ≤1% in relative measurements. A narrow collimated bremsstrahlung beam enters a high pressure ionisation chamber filled with hydrogen (deuterium), which acts as target as well as detector gas. Two large volume NaI-spectrometers (10No−dq×14No−dq), which will detect the Compton scattered photons under two different angles (90∘ and 130∘) serve as triggers for a coincident measurement of the energy and the angle of the recoiled nucleons in the ionisation chamber.
Recent results and the current status of the experiment will be presented.
∗Supported by the DFG (FOR 272/2-2 and SFB 634).