New Approach to Identify Negative and Positive Pions with a Scintillator Range Telescope in the 15-90 MeV Pion Energy Interval
| Autor: | J. Girard, L. Roussel, J. Poitou, V. Bellini, J. Julien, X. Charlot, G. S. Pappalardo, M. Bolore |
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| Rok vydání: | 1984 |
| Předmět: |
Physics
Nuclear and High Energy Physics Range (particle radiation) Particle physics Muon Meson Nuclear Theory Hadron Scintillator Particle detector Charged particle SCINTILLATION COUNTERS Nuclear physics Pion Nuclear Energy and Engineering High Energy Physics::Experiment Electrical and Electronic Engineering Nuclear Experiment |
| Zdroj: | IEEE Transactions on Nuclear Science. 31:131-132 |
| ISSN: | 0018-9499 |
| DOI: | 10.1109/tns.1984.4333226 |
| Popis: | A scintillator range telescope was designed to detect pions in a very intense background of charged particles (ca 5000 ps) and to identify pion charge in the 15-90 MeV range. Such a telescope has a solid angle of 20 msr and allows the simultaneous detection of a wide pion momentum range on the order of 70 MeV/c to 200 MeV/c for both pions plus and pions minus. Several angles can be simultaneously studied with three telescopes. The pion energy resolution of ca 3 MeV is less, however, than the corresponding 0.5 MeV of a magnetic spectrometer. The accuracy of the R ratio depends on the accuracy of the pion plus identification method. This identification is based on the detection of particles generated by the pion plus-to-muon-to-tau decay sequence with a mean life of 26 ns. One method relies on the fast recovery time of the associated electronics by using an appropriate delayed coincidence between poin plus and muon plus signals. The low efficiency of such a method does not permit the determination of the pion minus contribution. In order to improve the charge identification of pions, the authors use a new approach in their experiments, based on the measurement ofmore » the charge of the particle pulses within different time gates. This paper presents the principles of this approach. Three gates--a prompt, a normal, and a delayed gate-and their respective charge analyzers are used in the discussion.« less |
| Databáze: | OpenAIRE |
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