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Fragment production and collective motion in central Au+Au collisions

Technical Report:

Abstract

The light charged particles (Z=1,2) and intermediate mass fragments (3 {<=} Z {<=} 15) emitted within the forward cone {theta} {<=} 30deg in Au+Au collisions at 150 A.MeV beam energy have been measured at SIS-Darmstadt, using the phase I set-up of the 4{pi} detector. The central collisions have been selected by a cut on the total charged-particle multiplicity and a cut on the `transverse momentum directivity` D, a vector sum of the transverse momenta of the measured charge particles. For the events of the central collisions, large transverse momenta are observed especially for clusters (Z{>=}3), and the multiplicity of intermediate mass fragments in the acceptance of our setup is about 4. The calculations of a statistical model, a modified version of FREESCO, are compared to the experimental results. A reasonably good agreement has been found between the calculations and the experimental data for the fragment productions and corresponding velocity distributions. The separation of collective and thermal motion for the emitted fragments has been attained. (orig.).
Authors:
Publication Date:
May 01, 1992
Product Type:
Technical Report
Report Number:
GSI-92-11
Reference Number:
SCA: 663450; 663580; PA: DEN-92:015366; SN: 93000903662
Resource Relation:
Other Information: PBD: May 1992
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; GOLD 197 TARGET; GOLD 197 REACTIONS; DEEP INELASTIC HEAVY ION REACTIONS; TRANSVERSE MOMENTUM; GEV RANGE 10-100; MULTIPLICITY; LIGHT NUCLEI; NUCLEAR FRAGMENTS; EXPERIMENTAL DATA; DIFFERENTIAL CROSS SECTIONS; PARTICLE RAPIDITY; PROTONS; DEUTERONS; TRITONS; NUCLEAR REACTION YIELD; HELIUM ISOTOPES; LITHIUM ISOTOPES; BERYLLIUM ISOTOPES; BORON ISOTOPES; CARBON ISOTOPES; NITROGEN ISOTOPES; 663450; 663580; HEAVY-ION-INDUCED REACTIONS AND SCATTERING; A = 190-219
OSTI ID:
10104209
Research Organizations:
Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Other: ON: DE93742677; TRN: DE9215366
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
DEN
Size:
47 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Zhiguo, Fan. Fragment production and collective motion in central Au+Au collisions. Germany: N. p., 1992. Web.
Zhiguo, Fan. Fragment production and collective motion in central Au+Au collisions. Germany.
Zhiguo, Fan. 1992. "Fragment production and collective motion in central Au+Au collisions." Germany.
@misc{etde_10104209,
title = {Fragment production and collective motion in central Au+Au collisions}
author = {Zhiguo, Fan}
abstractNote = {The light charged particles (Z=1,2) and intermediate mass fragments (3 {<=} Z {<=} 15) emitted within the forward cone {theta} {<=} 30deg in Au+Au collisions at 150 A.MeV beam energy have been measured at SIS-Darmstadt, using the phase I set-up of the 4{pi} detector. The central collisions have been selected by a cut on the total charged-particle multiplicity and a cut on the `transverse momentum directivity` D, a vector sum of the transverse momenta of the measured charge particles. For the events of the central collisions, large transverse momenta are observed especially for clusters (Z{>=}3), and the multiplicity of intermediate mass fragments in the acceptance of our setup is about 4. The calculations of a statistical model, a modified version of FREESCO, are compared to the experimental results. A reasonably good agreement has been found between the calculations and the experimental data for the fragment productions and corresponding velocity distributions. The separation of collective and thermal motion for the emitted fragments has been attained. (orig.).}
place = {Germany}
year = {1992}
month = {May}
}