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Title: Isocaling and the symmetry energy in the multifragmentation regime of heavy-ion collisions

Abstract

The ratio of the symmetry energy coefficient to temperature, a{sub sym}/T, in Fermi energy heavy-ion collisions, was experimentally extracted as a function of the fragment atomic number using isoscaling parameters and the variance of the isotope distributions. The extracted values were compared to the results of calculations made with an antisymmetrized molecular dynamics (AMD) model employing a statistical decay code to account for deexcitation of excited primary fragments. The experimental values are in good agreement with the values calculated from the final ground-state products but are significantly different from those characterizing the yields of the primary AMD fragments.

Authors:
 [1];  [2];  [1]; ; ; ; ; ;  [1];  [3];  [1];  [4]
  1. Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States)
  2. Institute of Physics, Silesia University, PL-Katowice (Poland)
  3. FNRS and IPN, Universite Catholique de Louvain, B-1348 Louvain-Neuve (Belgium)
  4. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China)
Publication Date:
OSTI Identifier:
21388617
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 81; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevC.81.064613; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ATOMIC NUMBER; DE-EXCITATION; DISTRIBUTION; GROUND STATES; HEAVY ION REACTIONS; ISOTOPES; MOLECULAR DYNAMICS METHOD; NUCLEAR DECAY; NUCLEAR FRAGMENTATION; SYMMETRY; CALCULATION METHODS; DECAY; ENERGY LEVELS; ENERGY-LEVEL TRANSITIONS; NUCLEAR REACTIONS

Citation Formats

Chen, Z, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Kowalski, S, Huang, M, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Graduate University of Chinese Academy of Sciences, Beijing 100049, Wada, R, Hagel, K, Natowitz, J B, Materna, T, Qin, L, Sahu, P K, Keutgen, T, Bonasera, A, Laboratori Nazionali del Sud, INFN, via Santa Sofia, 62, I-95123 Catania, and Wang, J. Isocaling and the symmetry energy in the multifragmentation regime of heavy-ion collisions. United States: N. p., 2010. Web. doi:10.1103/PHYSREVC.81.064613.
Chen, Z, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Kowalski, S, Huang, M, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Graduate University of Chinese Academy of Sciences, Beijing 100049, Wada, R, Hagel, K, Natowitz, J B, Materna, T, Qin, L, Sahu, P K, Keutgen, T, Bonasera, A, Laboratori Nazionali del Sud, INFN, via Santa Sofia, 62, I-95123 Catania, & Wang, J. Isocaling and the symmetry energy in the multifragmentation regime of heavy-ion collisions. United States. https://doi.org/10.1103/PHYSREVC.81.064613
Chen, Z, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Kowalski, S, Huang, M, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Graduate University of Chinese Academy of Sciences, Beijing 100049, Wada, R, Hagel, K, Natowitz, J B, Materna, T, Qin, L, Sahu, P K, Keutgen, T, Bonasera, A, Laboratori Nazionali del Sud, INFN, via Santa Sofia, 62, I-95123 Catania, and Wang, J. 2010. "Isocaling and the symmetry energy in the multifragmentation regime of heavy-ion collisions". United States. https://doi.org/10.1103/PHYSREVC.81.064613.
@article{osti_21388617,
title = {Isocaling and the symmetry energy in the multifragmentation regime of heavy-ion collisions},
author = {Chen, Z and Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 and Kowalski, S and Huang, M and Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 and Graduate University of Chinese Academy of Sciences, Beijing 100049 and Wada, R and Hagel, K and Natowitz, J B and Materna, T and Qin, L and Sahu, P K and Keutgen, T and Bonasera, A and Laboratori Nazionali del Sud, INFN, via Santa Sofia, 62, I-95123 Catania and Wang, J},
abstractNote = {The ratio of the symmetry energy coefficient to temperature, a{sub sym}/T, in Fermi energy heavy-ion collisions, was experimentally extracted as a function of the fragment atomic number using isoscaling parameters and the variance of the isotope distributions. The extracted values were compared to the results of calculations made with an antisymmetrized molecular dynamics (AMD) model employing a statistical decay code to account for deexcitation of excited primary fragments. The experimental values are in good agreement with the values calculated from the final ground-state products but are significantly different from those characterizing the yields of the primary AMD fragments.},
doi = {10.1103/PHYSREVC.81.064613},
url = {https://www.osti.gov/biblio/21388617}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 6,
volume = 81,
place = {United States},
year = {Tue Jun 15 00:00:00 EDT 2010},
month = {Tue Jun 15 00:00:00 EDT 2010}
}