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Your search keyword '"N. Brummund"' showing total 5 results
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5 results on '"N. Brummund"'

1. Mass dependence of π0-production in heavy ion collisions at 1 A GeV

Author

V. Metag, S.C. Jeong, J. Ritman, H. W. Wilschut, D. Wohlfahrt, T. Wienold, R.S. Simon, M. Röbig-Landau, O. Schwalb, S. Hlavac, K. Teh, L.B. Venema, W. Kühn, Pascal Dupieux, R. W. Novotny, A. E. Raschke, U. Sodan, Nicole Bastid, Johannes Peter Wessels, J. P. Alard, Michal Sumbera, Gerard Montarou, W. Neubert, M. Franke, F. D. Berg, N. Herrmann, K. D. Hildenbrand, N. Brummund, Herbert Löhner, A. Gobbi, M. Pfeiffer, M. Notheisen, and Research unit Medical Physics

Subjects
Physics, DYNAMICS, Nuclear and High Energy Physics, High energy, Argon, COLLECTIVE FLOW, Krypton, Nuclear Theory, NUCLEUS-NUCLEUS COLLISIONS, Collision system, chemistry.chemical_element, PION-PRODUCTION, STATE, Nuclear physics, ENERGY, Pion, chemistry, Cascade, EQUATION, Heavy ion, PARTICLE-PRODUCTION, Multiplicity (chemistry), Atomic physics, Nuclear Experiment, MATTER
Abstract

The production of neutral pions has been studied in the reactions 40 Ar + nat Ca , 86 Kr + nat Zr and 197 Au + 197 Au at 1 A GeV. For high energy pions emitted from the heavier systems a steeper than linear rise of the pion multiplicity with the centrality of the reaction is observed, indicating a pion production process other than binary nucleon-nucleon collisions. At low transverse momenta an enhancement of the π 0 -multiplicity increasing with the mass of the collision system is found. Systematic discrepancies between the experimental results and recent BUU, QMD and Cascade calculations are discussed.

Published
1994

2. Neutral meson production in relativistic heavy ion collisions

Author

B. Krusche, F. D. Berg, O. Schwalb, M. Pfeiffer, R. W. Novotny, S. Hlaváč, R. Ostendorf, W. Kühn, W. Doring, W. Henning, A.L. Boonstra, M. Röbig, H. P. Braak, R. Holzmann, Herbert Löhner, V. Metag, N. Brummund, Y. Schutz, W. Hering, H. Ströher, R.S. Simon, W. Niebur, M. Franke, A. E. Raschke, L.B. Venema, R. Lorencz, J. Ritman, P. Gonthier, and Hans Wilschut

Subjects
Physics, Nuclear and High Energy Physics, Meson production, Nuclear Theory, Spectral line, Nuclear physics, Transverse momentum, Thermal, Nuclear fusion, High Energy Physics::Experiment, Heavy ion, Rapidity, Atomic physics, Nuclear Experiment
Abstract

The production of pi-0 and eta-mesons has been studied in the reactions Ne-20 + Al at 350 MeV/u and Ar-40 + Ca at 1.0 GeV/u. Rapidity distributions and transverse momentum spectra have been measured and are compared to thermal distributions.

Published
1991
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3. Azimuthal asymmetry of neutral pion emission in Au+Au reactions at 1 GeV/nucleon

Author

James Ritman, Y. Schutz, A. E. Raschke, H. P. Braak, R. Santo, J. Mösner, W. Kühn, A. Gobbi, Metag, U. Sodan, O. Schwalb, M. Pfeiffer, R. Kotte, S. Hlavac, M. Notheisen, R.S. Simon, K. Teh, D. Wohlfarth, W. Neubert, R.W. Ostendorf, T. Wienold, L.B. Venema, Herbert Löhner, Michal Sumbera, N. Brummund, R. Holzmann, F. D. Berg, N. Herrmann, K. D. Hildenbrand, Rudolf Siemssen, R. W. Novotny, H. W. Wilschut, J. P. Wessels, Research unit Medical Physics, Grand Accélérateur National d'Ions Lourds (GANIL), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear reaction, Physics, 25.75.+r, Meson, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, COLLECTIVE FLOW, Hadron, Nuclear Theory, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], HEAVY-ION COLLISIONS, MASS, Asymmetry, Charged particle, Nuclear physics, Baryon, Pion, PROJECTILE ENERGY, High Energy Physics::Experiment, Atomic physics, Nucleon, Nuclear Experiment, MATTER, media_common
Abstract

The azimuthal angle distributions of neutral pions at midrapidity from Au+Au reactions at 1 GeV/nucleon incident energy have been measured. An enhanced emission of [pi][sup 0]'s perpendicular to the reaction plane is observed. The azimuthal asymmetry is dependent on the [pi][sup 0] momentum: the [pi][sup 0] spectrum perpendicular to the reaction plane is harder than in the reaction plane. The strength of the observed asymmetry appears to be more pronounced for [pi][sup 0] than for charged particles and neutrons.

Published
1993
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4. Neutral pion production at 350 MeV/u in the system20Ne +27Al

Author

M. Röbig, F. D. Berg, M. Pfeiffer, W. F. Henning, N. Brummund, R.S. Simon, Metag, O. Schwalb, W. Kühn, Lars Venema, R. W. Novotny, W. Doring, H. Ströher, R. Holzmann, Herbert Löhner, M. Franke, A.L. Boonstra, Hans Wilschut, S. Hlavac, M. Appenheimer, J. Ritman, A. E. Raschke, and W. Niebur

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Pion, Photon, Spectrometer, Yield (chemistry), Nuclear fusion, Heavy ion, Atomic physics, Interpolation
Abstract

π0 -production probability of (9± 2)· 10− 3 per20Ne+Al reaction has been measured at 350 MeV/u using the Two Arm Photon Spectrometer TAPS. This yield is consistent with an interpolation of published π-production rates in heavy ion collisions.

Published
1990
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5. Design and performance of the saphir lead-glass calorimeter

Author

W. Hassenmeier, W. Verhoeven, H. Baumeister, G. Clewing, D. Grzonka, T. Peitzmann, R. Glasow, F. Berger, L. Dragon, M. Purschke, Herbert Löhner, N. Brummund, R. Wienke, Karl-Heinz Kampert, P. Beckmann, and R. Santo

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Photon, Physics::Instrumentation and Detectors, Detector, Particle identification, Particle detector, Calorimeter, Nuclear physics, Measuring instrument, High Energy Physics::Experiment, Invariant mass, Nuclear Experiment, Instrumentation
Abstract

For the WA80 fixed-target heavy-ion experiment at the CERN-SPS, a 1278 element lead-glass calorimeter has been constructed to measure photons in the energy range from 0.2 to 20 GeV. We describe the design of the detector, the achieved energy and position resolution, the gain monitoring system and the performance of the high-energy photon trigger. The quality of photon identification and π0 invariant mass reconstruction is discussed.

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