Razen, B. (Corresponding author)FZJ*

1997
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Report No.: Juel-3488

Abstract: This work presents measurements of the pp $\rightarrow$ d$\pi^{+}$ reaction at a beam momentum of 793 MeV/c and 801 MeV/c. Differential and total cross sections at these energies were measured with the magnetic spectrometer Big Karl, which grants a nearly 4$\pi$-acceptance in the center of mass system. A major emphasis is given to the deduction of the transfer-matrix of the magnetic system, which allows full momentum reconstruction of the deuterons at the target point. Anisotropies and partial wave contributions are deduced from these measurements. They suggest not negligible P-wave contribution allready elose to threshold. Comparing our data to the measurements of the isospin related re action np $\rightarrow$ d$\pi^{0}$ yields some difference, which might be a hint to some isospin-breaking. Finaly a measurement at 1920 MeV/c beam momentum was done to calibrate the momentum of the external beam of COSY.

1. Institut 2 (Experimentelle Kernphysik II) (IKP-2)