Berlin 2005 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 31: Elektromagnetische und Hadronische Proben

HK 31.8: Talk

Tuesday, March 8, 2005, 18:15–18:30, TU MA004

Deuteron Polarimetry at ANKE-COSY — •D. Chiladze^1,2, A. Kacharava^3,2, F. Rathmann¹, and C. Wilkin⁴ — ¹IKP, FZJ, Germany — ²HEPI TSU, Tbilisi, Georgia — ³PI II, Universität Erlangen-Nürnberg, Germany — ⁴UCL, London, England

Nuclear reactions induced by beams of 1.2 GeV vector and tensor polarised deuterons incident on a hydrogen cluster target have been studied in a test experiment at the ANKE magnetic spectrometer situated inside the storage ring COSY-Jülich. By measuring precisely the momenta of one or two charged final particles, it was possible to identify clearly the processes d^→p → dp, d^→p → dp_spπ⁰ (with a spectator proton p_sp), d^→p→ ³He π⁰, and d^→p→ (2p)n, which all have large and well determined analyzing powers. The analysis of these data, which allowed us to extract values of the vector and tensor polarisations of the beam, will be presented. The aim of our experimental programme is the direct reconstruction of the spin-dependent amplitudes, including relative phases, of large angle neutron-proton elastic scattering through the study of the p^→ (d^→,2p)n charge-exchange reaction. This work is supported by the FZJ.