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Investigations on Emission Sources in Proton-Nucleus and Nucleus-Nucleus Collisions

Mårtensson, Johan LU (2000)
Abstract
Emission sources in proton-nucleus and nucleus-nucleus collisions at intermediate energies have been studied.



Pion excitation functions from the absolute threshold to 500 MeV have been measured with an ion beam of continuously varying energy with an energy resolution of 1 MeV. Total yields, angular distributions and target mass dependences are compared to QMD and BUU calculations.



Proton/deuteron/triton ratios have been measured in p + Kr, 16O + Kr and 20Ne + Ar reactions with a continuously varying beam energy up to 500 AMeV. Experimental ratios are compared to calculations from statistical models as well as dynamical models. Statistical models fail to reproduce the experimental data, whereas the... (More)
Emission sources in proton-nucleus and nucleus-nucleus collisions at intermediate energies have been studied.



Pion excitation functions from the absolute threshold to 500 MeV have been measured with an ion beam of continuously varying energy with an energy resolution of 1 MeV. Total yields, angular distributions and target mass dependences are compared to QMD and BUU calculations.



Proton/deuteron/triton ratios have been measured in p + Kr, 16O + Kr and 20Ne + Ar reactions with a continuously varying beam energy up to 500 AMeV. Experimental ratios are compared to calculations from statistical models as well as dynamical models. Statistical models fail to reproduce the experimental data, whereas the dynamical models are only able to reproduce the experimental if a final-state interaction is introduced via the coalescence prescription. It is also shown that entropy cannot be directly dtermined from these ratios.



Correlation functions for two neutron, two proton and neutron-proton pairs as well as singles measuremnts have been measured simultaneously in the E/A = 45 MeV 58Ni-27Al reaction, and are compared to calculations from a statistical model. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Gaardhöje, Jens Jörgen, Köpenhamn
organization
publishing date
type
Thesis
publication status
published
subject
keywords
High energy interactions, Fysik, Physics, correlation function., fermion interferometry, t/p and d/p ratios, target mass dependence, pion angular distribution, pion excitation function, Heavy ion reactions, intermediate energy, cosmic rays, Kosmisk strålning, högenergi
pages
84 pages
publisher
Department of Physics, Lund University
defense location
Lecture Hall A of the Department of Physics
defense date
2000-11-17 13:15
external identifiers
  • other:ISRN: LUNFD6/NFFK-1018-SE-84P
ISBN
91-628-4473-3
language
English
LU publication?
yes
id
f2e47b48-4f55-4b39-89c1-48a95911c3d4 (old id 40954)
date added to LUP
2007-08-01 15:38:32
date last changed
2016-09-19 08:45:07
@phdthesis{f2e47b48-4f55-4b39-89c1-48a95911c3d4,
  abstract     = {Emission sources in proton-nucleus and nucleus-nucleus collisions at intermediate energies have been studied.<br/><br>
<br/><br>
Pion excitation functions from the absolute threshold to 500 MeV have been measured with an ion beam of continuously varying energy with an energy resolution of 1 MeV. Total yields, angular distributions and target mass dependences are compared to QMD and BUU calculations.<br/><br>
<br/><br>
Proton/deuteron/triton ratios have been measured in p + Kr, 16O + Kr and 20Ne + Ar reactions with a continuously varying beam energy up to 500 AMeV. Experimental ratios are compared to calculations from statistical models as well as dynamical models. Statistical models fail to reproduce the experimental data, whereas the dynamical models are only able to reproduce the experimental if a final-state interaction is introduced via the coalescence prescription. It is also shown that entropy cannot be directly dtermined from these ratios.<br/><br>
<br/><br>
Correlation functions for two neutron, two proton and neutron-proton pairs as well as singles measuremnts have been measured simultaneously in the E/A = 45 MeV 58Ni-27Al reaction, and are compared to calculations from a statistical model.},
  author       = {Mårtensson, Johan},
  isbn         = {91-628-4473-3},
  keyword      = {High energy interactions,Fysik,Physics,correlation function.,fermion interferometry,t/p and d/p ratios,target mass dependence,pion angular distribution,pion excitation function,Heavy ion reactions,intermediate energy,cosmic rays,Kosmisk strålning,högenergi},
  language     = {eng},
  pages        = {84},
  publisher    = {Department of Physics, Lund University},
  school       = {Lund University},
  title        = {Investigations on Emission Sources in Proton-Nucleus and Nucleus-Nucleus Collisions},
  year         = {2000},
}