Köln 2004 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 11: Poster Session: Electromagnetic and Hadronic Probes
HK 11.13: Poster
Dienstag, 9. März 2004, 13:30–15:30, Foyer
Study of the Bremsstrahlung radiation in the quasi-free n p → n p γ reaction — •Joanna Przerwa — Institute of Physics, Jagellonian University, Cracow, PL-30-059 Poland
Using a deuteron beam and a proton target the quasi-free n p → n p γ reaction has been studied at the COSY-11 facility, an internal magnetic spectrometer system at the cooler synchrotron COSY in Jülich. Data have been taken at a beam momentum of 3.165 GeV/c close to the threshold of the d p → d p η process. Events corresponding to the d p → p n γ ps reaction have been identified by measuring the outgoing charged as well as neutron ejectiles. The fast protons are detected by means of drift chambers and scintillator hodoscopes and the slow spectator protons are measured in a Si-pad arrangement close to the target. Neutrons and photons are registered in a scintillator/lead sandwich detector. The momentum vectors of the protons are reconstructed by tracking back the trajectories to the target point and the momentum of the neutron is calculated from the time-of-flight between target and neutron detector. For the calibration of the neutron detector the produced photons are used. The efficiency is determined by Monte Carlo studies supported by calibration measurements performed simultaneously to other reaction studies by selecting special reaction channels relevant for the neutron detector.
Results of the data analysis and the experimental techniques
will be presented and discussed.
Supported by Forschungszentrum Jülich.