Nuclear Fireball Model for Proton Inclusive Spectra from Relativistic Heavy-Ion Collisions

G. D. Westfall; J. Gosset; P. J. Johansen; A. M. Poskanzer; W. G. Meyer; H. H. Gutbrod; A. Sandoval; R. Stock

doi:10.1103/PhysRevLett.37.1202

Nuclear Fireball Model for Proton Inclusive Spectra from Relativistic Heavy-Ion Collisions

G. D. Westfall, J. Gosset, P. J. Johansen, A. M. Poskanzer, W. G. Meyer, H. H. Gutbrod, A. Sandoval, and R. Stock

Phys. Rev. Lett. 37, 1202 – Published 1 November 1976

Abstract

A simple model is proposed for the emission of nucleons with velocities intermediate between those of the target and projectile. In this model, the nucleons which are mutually swept out from the target and projectile form a hot quasiequilibrated fireball which decays as an ideal gas. The overall features of the proton-inclusive spectra from 250- and 400-MeV/nucleon ${}^{20}{Ne}$ ions and 400-MeV/nucleon ${}^{4}{He}$ ions interacting with uranium are fitted without any adjustable parameters.

Received 30 August 1976

DOI:https://doi.org/10.1103/PhysRevLett.37.1202

Authors & Affiliations

G. D. Westfall, J. Gosset^*, P. J. Johansen^†, A. M. Poskanzer, and W. G. Meyer

Lawrence Berkeley Laboratory, Berkeley, California 94720

H. H. Gutbrod

Gesellschaft für Schwerionenforschung, Darmstadt, Germany
Lawrence Berkeley Laboratory, Berkeley, California 94720

A. Sandoval

Fachbereich Physik, Universität Marburg, Marburg, Germany
Lawrence Berkeley Laboratory, Berkeley, California 94720

R. Stock

Fachbereich Physik, Universität Marburg, Marburg, Germany

^*Permanent address: Département de Physique Nucléaire et Moyenne Energie, Centre d'Etudes Nucléaires de Saclay, 91190 Gif-sur-Yvette, France.
^†Permanent address: Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark.