scholarly journals Neutron Production in Thick Targets Irradiated with High-Energy Ions

2011 ◽  
Vol 2011 ◽  
pp. 1-12 ◽  
Author(s):  
S. R. Hashemi-Nezhad ◽  
M. Zamani-Valasiadou ◽  
M. I. Krivopustov ◽  
R. Brandt ◽  
W. Ensinger ◽  
...  
Keyword(s):  
Yield Curve ◽  
Product Yield ◽  
Heavy Ion ◽  
High Energy ◽  
Neutron Production ◽  
Point Of View ◽  
Model Calculations ◽  
Ion Interactions ◽  
Fundamental Point ◽  
Primary Ions

The neutron production in thick targets irradiated with 1 GeV protons was studied experimentally, and results are well understood with model calculations, including MCNPX 2.7a. However, one observes very large neutron production rates in the interaction of 44 GeV 12C onto thick Cu-, Pb-, and U-targets beyond calculated rates. The experimental spallation product yield curve in a 20 cm thick Cu target irradiated with 72 GeV 40Ar also cannot be reproduced by several model codes, including MCNPX 2.7a. This may be due to secondary fragments produced in high energy ( GeV) heavy-ion interactions which destroy target nuclei more effectively than primary ions. These observed experimental facts constitute “unresolved problems” from a fundamental point of view. It may have an impact on radiation protection issues for future heavy-ion accelerators.

scholarly journals Causality constraints on hadron production in high energy collisions

2014 ◽  
Vol 23 (04) ◽  
pp. 1450019 ◽  
Author(s):  
Paolo Castorina ◽  
Helmut Satz
Keyword(s):  
Baryon Number ◽  
Heavy Ion ◽  
High Energy ◽  
Hadron Production ◽  
Space Time ◽  
Horizon Problem ◽  
Ion Interactions ◽  
Quantum Numbers ◽  
High Energy Collisions ◽  
Finite Space

For hadron production in high energy collisions, causality requirements lead to the counterpart of the cosmological horizon problem: the production occurs in a number of causally disconnected regions of finite space-time size. As a result, globally conserved quantum numbers (charge, strangeness, baryon number) must be conserved locally in spatially restricted correlation clusters. This provides a theoretical basis for the observed suppression of strangeness production in elementary interactions (pp, e+e-). In contrast, the space-time superposition of many collisions in heavy ion interactions largely removes these causality constraints, resulting in an ideal hadronic resonance gas in full equilibrium.

Rescattering probed by the emission of slow target associated particles in high-energy heavy-ion interactions

1995 ◽  
Vol 363 (4) ◽  
pp. 230-236 ◽  
Author(s):  
M.I Adamovich ◽  
M.M Aggarwal ◽  
Y.A Alexandrov ◽  
R Amirikas ◽  
N.P Andreeva ◽  
...  
Keyword(s):  
Heavy Ion ◽  
High Energy ◽  
Ion Interactions

High energy heavy ion interactions studied with SSNTDs

1995 ◽  
Vol 25 (1-4) ◽  
pp. 203-218 ◽  
Author(s):  
W. Heinrich ◽  
E. Becker ◽  
J. Dreute ◽  
S.E. Hirzebruch ◽  
G. Hüntrup ◽  
...  
Keyword(s):  
Heavy Ion ◽  
High Energy ◽  
Ion Interactions

TRANSVERSE ENERGY PRODUCTION IN LIGHT AND HEAVY ION INTERACTIONS

1989 ◽  
Vol 04 (14) ◽  
pp. 3377-3476 ◽  
Author(s):  
M.J. TANNENBAUM
Keyword(s):  
Reaction Mechanisms ◽  
Particle Physics ◽  
Energy Production ◽  
Transverse Energy ◽  
Heavy Ion ◽  
High Energy ◽  
Energy Distributions ◽  
Elementary Particle Physics ◽  
Ion Interactions ◽  
The Subject

Transverse energy distributions have proved to be useful in the understanding of reaction mechanisms of relativistic heavy ion interactions. The development of the subject is traced from its roots in elementary particle physics. A review and analysis of the data from recent measurements in high energy heavy ion beams at CERN and Brookhaven is presented.

scholarly journals Secondary Neutron-Production Cross Sections from Heavy-Ion Interactions between 230 and 600 MeV/Nucleon

2007 ◽  
Vol 157 (2) ◽  
pp. 142-158 ◽  
Author(s):  
L. Heilbronn ◽  
C. J. Zeitlin ◽  
Y. Iwata ◽  
T. Murakami ◽  
H. Iwase ◽  
...  
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
Heavy Ion ◽  
Neutron Production ◽  
Secondary Neutron ◽  
Ion Interactions

scholarly journals Comparative analysis of strange meson production in heavy ion collisions

2021 ◽  
Vol 2103 (1) ◽  
pp. 012134
Author(s):  
V S Borisov ◽  
A Ya Berdnikov ◽  
Ya A Berdnikov ◽  
D O Kotov ◽  
Iu M Mitrankov
Keyword(s):  
Experimental Data ◽  
Heavy Ion Collisions ◽  
Particle Production ◽  
High Energy Physics ◽  
Heavy Ion ◽  
High Energy ◽  
Jet Quenching ◽  
Model Calculations ◽  
Quenching Effect ◽  
Ion Collisions

Abstract The study of deconfinement state of nuclear matter called quark-gluon plasma (QGP) and phase transition of QGP to hadronic gas is the main goal of high energy physics. Some of the important signatures of QGP formation in heavy-ion collisions include strangeness enhancement at intermediate values of the transverse momentum (ρT ) and a jet quenching effect at high ρT values. Nuclear modification factors (RAB ) for light hadrons are used to quantify these effects. The K *0 and φ mesons can serve as a good probes to investigate QGP properties, because these mesons contain (anti)strange quark and its yields can be measured in a wide ρT range. Comparison of experimental data with theoretical model calculations is important for understanding the evolution of heavy-ion collision. One of the most commonly used event generators to describe experimental results of collider experiments is Pythia8. This paper shows, that Pythia8 predicts RAB values of K *0 and φ less than RAB values in experimental data. Consequently, additional (hidden)strange particle production mechanisms are involved.

EVIDENCE FOR MULTIPARTICLE CORRELATIONS IN HIGH-ENERGY HEAVY ION INTERACTIONS

1987 ◽  
Vol 02 (03) ◽  
pp. 169-176 ◽  
Author(s):  
P. BECKMANN ◽  
K.G.R. DOSS ◽  
H.A. GUSTAFSSON ◽  
H.H. GUTBROD ◽  
K.H. KAMPERT ◽  
...  
Keyword(s):  
Heavy Ion ◽  
High Energy ◽  
Heavy Ion Reactions ◽  
Particle Correlations ◽  
Ion Interactions ◽  
Plastic Ball

An exclusive approach is proposed to study azimuthal multiparticle correlations in heavy ion interaction. Strong many-particle correlations are found in relativistic heavy ion reactions measured with the Plastic Ball spectrometer. Energy, mass, and multiplicity dependence of the correlations are examined.

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