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Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 37: Nuclear Structure/Spectroscopy VI

HK 37.6: Talk

Thursday, March 11, 2004, 15:15–15:30, A

Tensor analyzing power Ayy in the SCRE configuration for the breakup reaction 1H(d,pp)n at Ed = 19 MeV — •J. Ley1, C.D. Düweke1, A. Imig1, H. Paetz gen. Schieck1, and H. Witała21IKP, Universität zu Köln, Germany — 2Jagellonian University Cracow, Poland

In the Symmetric Constant Relative Energy geometry all three nucleons of the dp breakup reaction are emitted at relative angles of 120 in the c.m. system. They have equal kinetic energies and both protons are emitted symmetrically to a plane defined by the reversed beam axis and the outgoing neutron. The SCRE final state can be characterized in the c.m. system by the angle α between the neutron momentum and the beam axis. The tensor analyzing power Ayy in this geometry has been calculated in the framework of the three-nucleon Faddeev theory using realistic nucleon-nucleon potentials. The comparison of older dp breakup data at Ed = 94.5 MeV [1] and Ed = 52.1 MeV [2] with theoretical predictions had shown significant deviations. In order to investigate, whether such deviations would appear at Ed = 19 MeV too, a breakup experiment with four SCRE and twelve adjacent situations was designed. First results will be reported.
Supported by the DFG.

[1] H. Witała et al., Phys. Rev. C 52 (1995) 2906

[2] L.M. Qin et al., Nucl. Phys. A 587 (1995) 252

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