HYDRODYNAMIC SIMULATIONS OF 16O+208Pb COLLISIONS AT 200 GeV/N

1989 ◽  
Vol 04 (11) ◽  
pp. 983-993 ◽  
Author(s):  
T.L. McABEE ◽  
J.R. WILSON ◽  
J.A. ZINGMAN ◽  
C.T. ALONSO
Keyword(s):  
Experimental Data ◽  
Equations Of State ◽  
Recent Experimental Data ◽  
Baryonic Matter ◽  
Hydrodynamic Simulations ◽  
200 Gev ◽  
Rapidity Distributions ◽  
Target Rapidity ◽  
Bombarding Energy ◽  
Initial Target

We investigate collisions of 16 O with 208 Pb at a bombarding energy of 200 GeV /N in the lab frame. Our basis is an ideal, one-fluid 3-D hydrodynamics model. Several equations of state are used to study the qualitative relation between final baryon rapidity distributions and the stiffness of the EOS. We find that 75% of the baryonic matter lies within one unit of the initial target rapidity, in qualitative agreement with recent experimental data. In addition, our calculation is able to reproduce the integrated value of the dET/dy distribution that is observed experimentally.

Charged-particle pseudorapidity (rapidity) distribution in nucleus–nucleus collisions at alternating-gradient synchrotron energy

2000 ◽  
Vol 78 (9) ◽  
pp. 851-855
Author(s):  
F -H Liu
Keyword(s):  
Experimental Data ◽  
Charged Particle ◽  
Rapidity Distribution ◽  
Target Size ◽  
Stopping Power ◽  
Target Nucleon ◽  
Rapidity Distributions ◽  
Bombarding Energy

The charged-particle pseudorapidity (rapidity) distributions in nucleus–nucleus collisions at the alternating-gradient synchrotron energy (11–15A GeV) have been described by the thermalized cylinder picture. The calculated results are in agreement with the experimental data of the reactions 28Si + Au, Ag, Cu, and Al at 14.6A GeV/c bombarding energy. It is shown that the target stopping power (the leading participant target nucleon rapidity shift with respect to the projectile) increases with the target size, and the projectile penetrating power (the leading participant projectile nucleon rapidity shift with respect to the target) decreases with the increasing of target size. PACS Nos.: 25.75-q, 25.75Dw, and 24.10pa

scholarly journals A THERMODYNAMICAL BAG MODEL FOR THE NUCLEON SPIN

1996 ◽  
Vol 11 (02) ◽  
pp. 147-156 ◽  
Author(s):  
V. DEVANATHAN ◽  
J.S. McCARTHY
Keyword(s):  
Experimental Data ◽  
Equations Of State ◽  
Recent Experimental Data ◽  
Nucleon Spin ◽  
Bag Model ◽  
Sum Rule ◽  
Bjorken Sum Rule

A thermodynamical bag model was developed to study the nucleon spin. Equations of state for the bag are deduced and solved self-consistently. The recent experimental data of the SMC and the E143 collaboration and the Bjorken sum rule are completely explained within the framework of the model.

SIMULATIONS OF DYNAMIC PION PRODUCTION IN 60 AND 200 A GEV COLLISIONS OF 16O+197AU

1990 ◽  
Vol 05 (03) ◽  
pp. 543-558 ◽  
Author(s):  
J.R. WILSON ◽  
T.L. MCABEE ◽  
C.T. ALONSO
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Pion Production ◽  
Laboratory Frame ◽  
Experimental Measurements ◽  
Spatial Distributions ◽  
Hydrodynamic Simulations ◽  
200 Gev ◽  
Gamma Law ◽  
D Model

We have investigated collisions of 16O with 197Au at bombarding energies of 60 and 200 GeV/N in the laboratory frame. Our hydrodynamics-based 3-D model, with a modified gamma-law equation of state, includes detailed dynamic pion production and propagation. A comparison of hydrodynamic simulations with and without the inclusion of pions shows that including the pion channel yields results which more closely reproduce the experimental data. We show direct comparisons of several predicted observables with experimental measurements made over various pseudorapidity ranges. In general, we find that while our overall energy agreement with calorimetry experiments is good, and our predicted spatial distributions are in fair agreement with experimental data, our model produces pions which are too energetic and too few in balancing proportions. Our results indicate that most of the emitted (measured) pions emerge from the cooler surface, and not from the hot, dense interior of the hadronic composite.

Fusion and Breakup Reactions of 17S + 208Pb and 15C + 232ThHalo Nuclei Systems

2015 ◽  
Vol 11 (2) ◽  
pp. 2972-2978
Author(s):  
Fouad A. Majeed ◽  
Yousif A. Abdul-Hussien
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Fusion Reaction ◽  
Fusion Cross Section ◽  
Reaction Cross ◽  
Recent Experimental Data ◽  
Barrier Distribution ◽  
Coupled Channel ◽  
Total Fusion ◽  
Full Quantum

In this study the calculations of the total fusion reaction cross section have been performed for fusion reaction systems 17F + 208Pb and 15C + 232Th which involving halo nuclei by using a semiclassical approach.The semiclassical treatment is comprising the WKB approximation to describe the relative motion between target and projectile nuclei, and Continuum Discretized Coupled Channel (CDCC) method to describe the intrinsic motion for both target and projectile nuclei. For the same of comparsion a full quantum mechanical clacualtions have been preforemd using the (CCFULL) code. Our theorticalrestuls are compared with the full quantum mechaincialcalcuations and with the recent experimental data for the total fusion reaction  checking the stability of the distancesThe coupled channel calculations of the total fusion cross section σfus, and the fusion barrier distribution Dfus. The comparsion with experiment proves that the semiclassiacl approach adopted in the present work reproduce the experimental data better that the full quantal mechanical calcautions. 

Properties of Refrigerants from Cubic Equations of State

2008 ◽  
Vol 59 (5) ◽  
Author(s):  
Viorel Feroiu ◽  
Dan Geana ◽  
Catinca Secuianu
Keyword(s):  
Experimental Data ◽  
Vapor Pressure ◽  
Equations Of State ◽  
Ternary Mixtures ◽  
Volumetric Properties ◽  
Mixing Rules ◽  
Saturation Curve ◽  
Equilibrium Thermodynamic ◽  
Liquid Equilibrium ◽  
Binary And Ternary Mixtures

Vapour � liquid equilibrium, thermodynamic and volumetric properties were predicted for three pure hydrofluorocarbons: difluoromethane (R32), pentafluoroethane (R125) and 1,1,1,2 � tetrafluoroethane (R134a) as well as for binary and ternary mixtures of these refrigerants. Three cubic equations of state GEOS3C, SRK (Soave � Redlich � Kwong) and PR (Peng � Robinson) were used. A wide comparison with literature experimental data was made. For the refrigerant mixtures, classical van der Waals mixing rules without interaction parameters were used. The GEOS3C equation, with three parameters estimated by matching several points on the saturation curve (vapor pressure and corresponding liquid volumes), compares favorably to other equations in literature, being simple enough for applications.

EQUATIONS OF STATE FOR FLUIDS: THE LIQUID-VAPOR EQUILIBRIUM (LVE)

2008 ◽  
Vol 22 (30) ◽  
pp. 5335-5347 ◽  
Author(s):  
JIANXIANG TIAN ◽  
YUANXING GUI
Keyword(s):  
Experimental Data ◽  
Equations Of State ◽  
Packing Fraction ◽  
Optimal Choice ◽  
Critical Conditions ◽  
Mechanics Model ◽  
Vapor Equilibrium ◽  
Pure Substances ◽  
Compressibility Factors ◽  
Liquid Vapor

Historically, the development of equations of state for fluids has almost invariably followed the lead of the van der Waals (vdW) equation which includes an attraction term and a repulsion term. In this paper, using a simple statistical mechanics model, we introduce a parameter σ as both the power and a coefficient of the packing fraction y which locates at the numerator of the vdW attraction term. Then nine equations of state are constructed to solve the critical conditions and the main thermodynamic properties of pure substances at liquid-vapor equilibrium. As a result, the correct critical compressibility factors of Nitrogen, Argon, Carbon dioxide, Ethene, Methane, Oxygen, Propene, Water and Hydrogen, are obtained with an optimal choice of parameter σ. Good predictions of these equations to the liquid-vapor equilibrium properties below critical temperature are reported and compared with experimental data.

The study of the refractive scattering of 6Li and 6He on carbon target with the S-matrix approach

2021 ◽  
Vol 36 (36) ◽  
Author(s):  
Liyuan Hu ◽  
Yushou Song ◽  
Yingwei Hou ◽  
Huilan Liu ◽  
Gongming Yu
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Forward Direction ◽  
Matrix Approach ◽  
Carbon Target ◽  
Intermediate Energies ◽  
S Matrix ◽  
Bombarding Energy

In this paper, the S-matrix parametrization is adopted to analyze the refractive scattering of [Formula: see text] at intermediate energies systematically and that of [Formula: see text] at 230 MeV. For [Formula: see text], the experimental data containing the Fraunhofer oscillations and the rainbow falloff are reproduced very well by adjusting parameters. The S-matrix parameters and the rainbow angles show evident tendencies as the bombarding energy increases, which are comparable with those of [Formula: see text] elastic scattering on carbon target. For [Formula: see text], the experimental data in the forward direction are reproduced successfully by slightly adjusting the parameters used in the calculation of [Formula: see text] at 210 MeV. The calculated results show that the [Formula: see text] scattering exhibits a comparable transparency with that of [Formula: see text] at intermediate energies.

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