Gießen 2007 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 49: Poster
HK 49.7: Poster
Thursday, March 15, 2007, 16:00–17:00, P
Novel Technique to Measure the Polarizability of the Nucleon∗ — •O. Yevetska1, J. Ahrens3, V. Chizhov2, V. Iatsioura2, E. Maev2, G. Petrov2, A. Richter1, G. Schrieder1, L. Sergeev2, and S. Watzlawik1 — 1Institut für Kernphysik, TechnischeUniversität Darmstadt, Darmstadt, Germany — 2Petersburg Nuclear Physics Institute,Petersburg, Russia — 3Institut für Kernphysik,Johannes Gutenberg-Universität, Mainz, Germany
At the Superconducting DArmstadt electron LINear
ACcelerator, S-DALINAC, an experiment has been built up to
measure the electric and magnetic polarizabilities of the proton
and the deuteron by low-energy Compton scattering. A novel
experimental method is used for an energy-dependent determination
of the differential cross sections in the photon energy range
20-100 MeV at two angles of elastic γ p/γd
scattering in a model-independent way with a precision ≤1%
. A narrow collimated bremsstrahlung photon beam enters two high
pressure ionisation chambers filled with hydrogen (deuterium),
which act as active target as well as detector gas for anode
strips measuring the recoiling protons (deuterons). Two large
volume NaI-spectrometers detect the Compton scattered photons
under two angles ( 90∘, 130∘ ) and serve as
triggers for coincidence measurements of the energy and angle of
the recoiling nucleons in the chambers.
A test-experiment was carried out in August 2006 at the S-DALINAC
using an electron beam at 60 MeV. Preliminary results will be
discussed.
⋆ Supported by the DFG through SFB 634.