Subthreshold Negative Pions and Energetic Protons Produced at θcm = 90° in 246 MeV/nucleon 139La + 139La Collisions

G.F. Krebs, J.-F. Gilot, P.N. Kirk, G. Claesson, J. Miller, H.G. Pugh, L.S. Schroeder, G. Roche, J. Vicente, K. Beard, W. Benenson, J. van der Plicht, B. Sherrill, J.W. Harris

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Abstract

The inclusive cross section for subthreshold negative pions and high energy protons produced at θcm = 90° has been measured for 139La + 139La at 246 MeV/nucleon. The spectrum of negative pions exhibits no bump or sharp break as has been suggested by theoretical speculation on the formation of a pionic instability in central nucleus-nucleus collisions. The measured spectra for both pions and protons are compared with results of a phase space model and an intranuclear cascade calculation.
Original languageEnglish
Pages (from-to)37-40
Number of pages4
JournalPhysics Letters B
Volume171
Issue number1
DOIs
Publication statusPublished - 17-Apr-1986

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