Pion production and charged-particle multiplicity selection in relativistic nuclear collisions

  • Spectra of positive pions with energies of 15-95 MeV were measured for high energy proton, 4He, 20Ne, and 40Ar bombardments of targets of 27Al, 40Ca, 107,109Ag, 197Au, and 238U. A Si-Ge telescope was used to identify charged pions by dE / dx-E and, in addition, stopped pi + were tagged by the subsequent muon decay. In all, results for 14 target-projectile combinations are presented to study the dependence of pion emission patterns on the bombarding energy (from E / A=0.25 to 2.1 GeV) and on the target and the projectile masses. In addition, associated charged-particle multiplicities were measured in an 80-paddle array of plastic scintillators, and used to make impact parameter selections on the pion-inclusive data. NUCLEAR REACTIONS U(20Ne, pi +), E / A=250 MeV; U(40Ar, pi +), Ca(40Ar, pi +), U(20Ne, pi +), Au(20Ne, pi +), Ag(20Ne, pi +), Al(20Ne, pi +), U(4He, pi +), Al(4He, pi +). E / A=400 MeV; Ca(40Ar, pi +), U(20Ne, pi +), U(4He, pi +), U(p, pi +), E / A=1.05), GeV; U(20Ne, pi +), E / A=2.1 GeV; measured sigma (E, theta ), inclusive and selected on associated charged-particle multiplicity.

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Author:Kevin L. Wolf, Hans Herbert Gutbrod, W. G. Meyer, Arthur M. PoskanzerORCiDGND, Andres SandovalORCiD, Reinhard StockGND, Jean Gosset, Jean Claude Jourdain, Chuck King, George King, Nguyen Van Sen, Gary D. WestfallGND
Parent Title (German):Physical review. C
Document Type:Article
Date of Publication (online):2005/09/20
Year of first Publication:1982
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/09/20
First Page:2572
Last Page:2594
Source:Phys. Rev. C 26, 2572-2594 (1982), ©1982 The American Physical Society, http://link.aps.org/abstract/PRC/v26/p2572
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht