Simulation of neutron production in hadron-nucleus and nucleus-nucleus interactions in Geant4

Studying experimental data obtained at ITEP [1] on neutron production in interactions of protons with various nuclei in the energy range from 747 MeV up to 8.1 GeV, we have found that slow neutron spectra have scaling and asymptotic properties [2]. The spectra weakly depend on the collision energy at momenta of projectile protons larger than 5 – 6 GeV/c. These properties are taken into account in the Geant4 Fritiof (FTF) model. The improved FTF model describes as well as the Geant4 Bertini model the experimental data on neutron production by 1.2 GeV and 1.6 GeV protons on targets (Fe, Pb) [3] and by 3.0 GeV protons on various targets (Al, Fe, Pb) [4]. For neutron production in antiproton-nucleus interactions, it is demonstrated that the FTF results are in a satisfactory agreement with experimental data of the LEAR collaboration [5]. The FTF model gives promising results for neutron production in nucleus - nucleus interactions at projectile energy 1 – 2 GeV per nucleon [6]. The observed properties allow one to predict neutron yields in the nucleus-nucleus interactions at high and very high energies. Predictions for the NICA/MPD experiment at JINR are presented.

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Pion exchange in inclusive neutron production at very high energies

Lettere al Nuovo Cimento ◽

10.1007/bf02824353 ◽

1976 ◽

Vol 16 (4) ◽

pp. 97-101 ◽

Cited By ~ 4

Author(s):

E. Ferrari ◽

M. Lusignoli ◽

Y. Srivastava

Keyword(s):

Neutron Production ◽

Pion Exchange ◽

High Energies ◽

Very High

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The Mixed Phase Collision Energy Range from the Experimental Data

Acta Physica Polonica B ◽

10.5506/aphyspolb.45.2319 ◽

2014 ◽

Vol 45 (12) ◽

pp. 2319

Author(s):

M. Gazdzicki

Keyword(s):

Experimental Data ◽

Energy Range ◽

Collision Energy ◽

Mixed Phase

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Pseudorapidity Distribution of Charged Particles and Square Speed of Sound Parameter inp-porp-p-Collisions over an Energy Range from 0.053 to 7 TeV

Advances in High Energy Physics ◽

10.1155/2014/569079 ◽

2014 ◽

Vol 2014 ◽

pp. 1-9 ◽

Cited By ~ 3

Author(s):

Ya-Qin Gao ◽

Tian Tian ◽

Li-Na Gao ◽

Fu-Hu Liu

Keyword(s):

Experimental Data ◽

Energy Range ◽

Speed Of Sound ◽

Hydrodynamic Model ◽

Charged Particles ◽

Pseudorapidity Distribution ◽

Proton Antiproton ◽

Proton Proton ◽

High Energies ◽

Related Energy

Pseudorapidity distributions of charged particles produced in proton-proton (p-p) or proton-antiproton (p-p-) collisions over an energy range from 0.053 to 7 TeV are studied by using the four-component Landau hydrodynamic model. The results calculated by the model are in agreement with the experimental data of the UA5, PHOBOS, UA1, P238, CDF, ALICE, and CMS Collaborations which present orderly from low to high energies. According to the distribution widths of different components, the values and some features of square speed of sound parametercs2for “participant” and “spectator” quark components are obtained. It is shown that the speed of sound for “participant” quark components agrees approximately with that for “spectator” quark components in the error ranges. The present work is useful for studying nucleus-nucleus collisions in the related energy range.

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Unusual and multicore extensive air showers

International Journal of Modern Physics D ◽

10.1142/s0218271819501451 ◽

2019 ◽

Vol 28 (11) ◽

pp. 1950145

Author(s):

Saeed Doostmohammadi ◽

Seyed Jaliledin Fatemi ◽

Maryam Nikpour

Keyword(s):

Experimental Data ◽

Energy Range ◽

Extensive Air Showers ◽

Air Showers ◽

Hadronic Interaction ◽

Interaction Models ◽

Nuclear Collisions ◽

High Energies ◽

Shower Size

Unusual and multicore extensive air showers are detected in some experiments. Study of these kinds of showers is an important issue in nuclear collisions at high energies and need to be interpreted by hadronic interaction models. In the work, taking into account results Sleptsova et al. of which emphasized shower size variations at energies above [Formula: see text][Formula: see text]eV, and also by using of the auger experimental data, some characteristics of multicore events are investigated. Intense nuclear variations are seen in energy range of [Formula: see text]–[Formula: see text][Formula: see text]eV, and nuclear distinctive properties of multicore showers relative to normal showers are shown.

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Topological cross sections in hadron-nucleon and hadron-nucleus collisions at very high energies

Nuclear Physics A ◽

10.1016/0375-9474(83)90261-0 ◽

1983 ◽

Vol 399 (2) ◽

pp. 515-528 ◽

Cited By ~ 6

Author(s):

H.J. Pirner ◽

W.Q. Chao ◽

M.K. Hegab

Keyword(s):

Cross Sections ◽

High Energies ◽

Very High

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ELASTIC SCATTERING WITH THE LIPATOV POMERON

Modern Physics Letters A ◽

10.1142/s0217732392003852 ◽

1992 ◽

Vol 07 (26) ◽

pp. 2415-2421 ◽

Cited By ~ 1

Author(s):

A. P. CONTOGOURIS ◽

F. LEBESSIS

Keyword(s):

Asymptotic Behavior ◽

Elastic Scattering ◽

Specific Model ◽

Scattering Data ◽

High Energies ◽

Very High

First a unitarization procedure for an amplitude with the asymptotic behavior of the Lipatov Pomeron is presented; it amounts to its iteration along the s-channel. Next, based on this procedure, a specific model is considered and applied to the description of elastic scattering data at very high energies; it is shown that it leads to a fair description of them.

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Investigation of Emulsion Flow in Steam-Assisted Gravity Drainage

SPE Journal ◽

10.2118/157830-pa ◽

2013 ◽

Vol 18 (03) ◽

pp. 440-447 ◽

Cited By ~ 13

Author(s):

C.C.. C. Ezeuko ◽

J.. Wang ◽

I.D.. D. Gates

Keyword(s):

Experimental Data ◽

Numerical Simulation ◽

Oil Recovery ◽

Vital Role ◽

Gravity Drainage ◽

Steam Assisted Gravity Drainage ◽

Emulsion Flow ◽

Very High ◽

Effective Representation

Summary We present a numerical simulation approach that allows incorporation of emulsion modeling into steam-assisted gravity-drainage (SAGD) simulations with commercial reservoir simulators by means of a two-stage pseudochemical reaction. Numerical simulation results show excellent agreement with experimental data for low-pressure SAGD, accounting for approximately 24% deficiency in simulated oil recovery, compared with experimental data. Incorporating viscosity alteration, multiphase effect, and enthalpy of emulsification appears sufficient for effective representation of in-situ emulsion physics during SAGD in very-high-permeability systems. We observed that multiphase effects appear to dominate the viscosity effect of emulsion flow under SAGD conditions of heavy-oil (bitumen) recovery. Results also show that in-situ emulsification may play a vital role within the reservoir during SAGD, increasing bitumen mobility and thereby decreasing cumulative steam/oil ratio (cSOR). Results from this work extend understanding of SAGD by examining its performance in the presence of in-situ emulsification and associated flow of emulsion with bitumen in porous media.

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