64 research outputs found
How to create an interface between UrQMD and Geant4 toolkit
An interface between the UrQMD-1.3cr model (version 1.3 for cosmic air
showers) and the Geant4 transport toolkit has been developed. Compared to the
current Geant4 (hybrid) hadronic models, this provides the ability to simulate
at the microscopic level hadron, nucleus, and anti-nucleus interactions with
matter from 0 to 1 TeV with a single transport code. This document provides
installation requirements and instructions, as well as class and member
function descriptions of the software.Comment: 52 pages, 1 figure, Geant4-UrQMD_interfac
Wavelet analysis of angular distributions of secondary particles in high energy nucleus-nucleus interactions. Irregularity of particle pseudorapidity distributions
Experimental data on sulphur and oxygen nuclei interactions with
photoemulsion nuclei at the energies of 200 and 60 GeV/nucleon are analyzed
with the help of a continuous wavelet transform. Irregularities in
pseudorapidity distributions of narrow groups of the secondary shower particles
in the mentioned interactions are observed at application of the second order
derivative of Gaussian as a wavelet. The irregularities can be interpreted as
an existence of the preference emission angles of groups of particles. Such an
effect is expected at emission of Cherenkov gluons in nucleus-nucleus
collisions. Some of the positions of the observed peculiarities on the
pseudorapidity axis coincide with those found by I.M.Dremin et al. (I.M.Dremin
et al. Phys. Lett., 2001, v. B499, p. 97).)Comment: 11 pages, 7 figure
Enabling comparison of UrQMD with Geant4 hadronic models
Geant4 has an abundant set of physics models that handle the diverse
interaction of particles with matter across a wide energy range. However, there
are also many well established reaction codes currently used in the same fields
where Geant4 is applied. One such code is the Ultra-relativistic Quantum
Molecular Dynamics (UrQMD) model. In order to take advantage of the UrQMD code,
we create a tool to enable comparisons among UrQMD and Geant4 hadronic models.
This tool allows a user to process the output file of UrQMD through Geant4
toolkit, while at the same time, can choose among different Geant4 hadronic
model generators. As an example, the UrQMD model is compared with the HARP-CDP
experimental data and with the Binary and FRITIOF generators, in the framework
of Geant4. It is shown that the UrQMD model can better reproduce charged pion
production for p+Cu and Pb interactions at 3, 8 and 15 GeV/c, and is a good
candidate for Geant4 hadronic models.Comment: 17 pages, 5 Figure
Analysis of hadron production in nucleus-nucleus interactions up to and out of kinematical limit of free NN-collisions in the frame of FRITIOF model
In the framework of the modified FRITIOF model, the inclusive spectra of the
cumulative -, -mesons and protons produced in the
nucleus-nucleus interactions at 4.5 GeV/c/nucleon and 4.2 GeV/c/nucleon are
calculated. It is shown that the model reproduces qualitatively, and in some
cases quantitatively the main experimental regularities of -mesons
production, and "soft" part of the proton spectra. According to the model the
production of the cumulative particles is connected with the mechanism of the
"soft" nucleon-nucleon interaction.Comment: 12 pages, 11 figure
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