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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 A_yy in the SCRE configuration for the breakup reaction ¹H(d^→,pp)n at E_d^→ = 19 MeV — •J. Ley¹, C.D. Düweke¹, A. Imig¹, H. Paetz gen. Schieck¹, and H. Witała² — ¹IKP, 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 A_yy 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 E_d^→ = 94.5 MeV [1] and E_d^→ = 52.1 MeV [2] with theoretical predictions had shown significant deviations. In order to investigate, whether such deviations would appear at E_d^→ = 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