Pion production and nuclear-fireball characteristics in heavy-ion collisions at 0. 1--1 GeV/nucleon

Journal Article · Thu Jun 01 04:00:00 EDT 1989 · Soviet Journal of Nuclear Physics (English Translation); (USA)

OSTI ID:5091118

Zubkov, M D ^[1]

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1. V. G. Khlopin Radium Institute (SU)

The statistical model taking into account the finiteness of the number of particles in the statistical ensemble is used to analyze the proton and {pi}-meson spectra in heavy-ion collisions at 0.1--1 GeV/nucleon. The role of the {Delta} resonance in the formation of the pion spectrum, the reasons for the deviation of the pion spectra from the Maxwell shape, and the reasons for the differences between the slope parameters of the pion and proton spectra are discussed. It is shown that the dependence of the slope parameters of the pion and proton spectra on the mass of the colliding nuclei is explained by finite-size effects of the statistical ensemble. The temperature of the nuclear fireball is obtained, and the degree of thermalization of nuclear matter at the freezing density is estimated. It is shown that the assumption that free decay of the {Delta} isobar dominates in the formation of the pion spectrum is inconsistent with the observed shape of the {pi}-meson energy distribution.

• OSTI ID: 5091118
• Journal Information: Soviet Journal of Nuclear Physics (English Translation); (USA), Journal Name: Soviet Journal of Nuclear Physics (English Translation); (USA) Vol. 49:6; ISSN 0038-5506; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
BOSONS
CHARGED-PARTICLE REACTIONS
DELTA BARYONS
DELTA-1232 BARYONS
ELEMENTARY PARTICLES
ENERGY SPECTRA
FERMIONS
HADRONS
HEAVY ION REACTIONS
MATHEMATICAL MODELS
MATTER
MESONS
N BARYONS
NUCLEAR FIREBALL MODEL
NUCLEAR MATTER
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE PRODUCTION
PIONS
PROTONS
PSEUDOSCALAR MESONS
SPECTRA