Tübingen 2003 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 10: Poster-Sitzung: Kernphysik/Spektroskopie
HK 10.2: Poster
Tuesday, March 18, 2003, 13:30–15:30, Foyer
Background measurements in Λ hypernuclei production at GSI — •A. Banu1,2, T. Saitoh1, F. Becker1, J. Gerl1, M. Górska1, I. Kojouharov1, Y. Kopatch3, J. Li1, R. Lozeva1, S. Mandal1, J. Pochodzalla4, W. Prokopowicz1, N. Saito1, H. Schaffner1, and R.S. Simon1 — 1Gesellschaft für Schwerionenforschung, D–64291 Darmstadt, Germany — 2Universität Mainz, D–55099 Mainz, Germany — 3Frank Laboratory of Neutron Physics, Joint Institut for Nuclear Research, 141980 Dubna, Russia — 4Institut für Kernphysik, Universität Mainz, D–55099 Mainz, Germany
A new opportunity exists at GSI: high resolution γ-ray spectroscopy of Λ hypernuclei produced via (π+,K+) reaction.
In order to test the feasibility of our experimental set-up, test experiments were carried out at GSI.
In the most recent test experiment, we have aimed to investigate the nature of background of π+ induced reactions. We expect that particles from the decay of nucleon resonances mainly contribute to the background. A BaF2 detector with six NaI detectors surrounding it and a plastic scintillator in front of it, were used to discriminate among radiation and different kinds of particles like π+’s, neutrons or high energy γ-rays. The results of this measurement will be discussed.
The performance of the beam spectrometer for tracking π+’s, which consists of two time-of-flight plastic scintillators and a position sensitive Silicon strip detector, will be discussed, as well.