# Source Density Distribution and Intensity Interferometry in High-Energy Heavy-Ion Collisions

• The fitted spatial parameter from intensity interferometry relates to an average radius of the particle-emitting source.The mean-square radius 2> of the source can be estimated by the small relative momentum correlation function.More detailed information about the source density distribution can be inferred from the value of k=2>/2>.A study of central collisions of 1.8A GeV Ar+Pb at the at the bevalac streamer chamber shows that the data are consistent with an a prioriGaussian model for the density distribution at the present level of experimental accuracy.The average radius of the pion source in the reaction is deduced,and a possible picture to describe the expanding pion source is presented.
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LIU Yi-Ming, HUO Lei, JIANG Yu-Zhen and WANG Shan. Source Density Distribution and Intensity Interferometry in High-Energy Heavy-Ion Collisions[J]. Chinese Physics C, 1991, 15(2): 123-130.
LIU Yi-Ming, HUO Lei, JIANG Yu-Zhen and WANG Shan. Source Density Distribution and Intensity Interferometry in High-Energy Heavy-Ion Collisions[J]. Chinese Physics C, 1991, 15(2): 123-130.
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沈阳化工大学材料科学与工程学院 沈阳 110142

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## Source Density Distribution and Intensity Interferometry in High-Energy Heavy-Ion Collisions

###### Corresponding author: LIU Yi-Ming,
• Department of Physics,Haerbin University of Technology,1500061 Department of Physics,Kent State University,Kent,Ohio 442422 Department of Physics,University of California,Riverside,CA 92521

Abstract: The fitted spatial parameter from intensity interferometry relates to an average radius of the particle-emitting source.The mean-square radius 2> of the source can be estimated by the small relative momentum correlation function.More detailed information about the source density distribution can be inferred from the value of k=2>/2>.A study of central collisions of 1.8A GeV Ar+Pb at the at the bevalac streamer chamber shows that the data are consistent with an a prioriGaussian model for the density distribution at the present level of experimental accuracy.The average radius of the pion source in the reaction is deduced,and a possible picture to describe the expanding pion source is presented.

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