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Start Over Author "Chun-Wang Ma" Journal chinese physics letters
10 results on '"Chun-Wang Ma"'

1. A Model Comparison Study of Fragment Production in 140AMeV58,64Ni+9Be Reactions

Author

Shan-Shan Wang, Yan-Li Zhang, Chun-Yuan Qiao, and Chun-Wang Ma

Subjects
Nuclear physics, Physics, Molecular dynamics, Fragment (logic), Nuclear Theory, Comparison study, General Physics and Astronomy, Production (computer science), Nuclear Experiment, Projectile fragmentation, eye diseases
Abstract

The cross sections of fragments produced in the 140 A MeV58,64Ni+9 Be projectile fragmentation reactions are calculated by using the antisymmetrized molecular dynamics (AMD) model, the modified statistical abrasion-ablation (SAA) model, and the empirical EPAX2/EPAX3 formulae. The Gogny-g0 interaction is taken as the effective nucleon-nucleon interaction in the AMD calculation, and the decays of fragments obtained from the AMD results are calculated by using the GEMINI code. The calculated cross sections of fragments are compared.

Published
2015
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2. Surface and Volume Symmetry Energy Coefficients of a Neutron-Rich Nucleus

Author

Jie Pu, Chun-Wang Ma, Ju-Bao Yang, Shan-Shan Wang, Mian Yu, and Hui-Ling Wei

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Binding energy, Analytical chemistry, General Physics and Astronomy, Nuclear matter, Theoretical physics, medicine.anatomical_structure, medicine, Isobaric process, Neutron, Linear correlation, Nuclear Experiment, Nucleus
Abstract

Using an isobaric method, the symmetry-energy coefficient (a(sym)) of a neutron-rich nucleus is obtained from experimental binding energies. The shell effects are shown in a(sym)*/A equivalent to 4a(sym)/A of nuclei. A (sub) magic neutron magic number N = 40 is suggested in a very neutron-rich nucleus, and a(sym)*/A of a nucleus is found to decrease when its mass increases. The a(sym)*/A of a very neutron-rich nucleus with large mass saturates. The volume-symmetry coefficients (b(v)) and surface-symmetry coefficients (b(s)) of a neutron-rich nucleus are extracted from a(sym)*/A by a correlation a(sym)*/A = b(v)/A - b(s)/A (4/3). It is found that b(v) and b(s) decrease when the nucleus becomes more neutron-rich, and tend to saturate in the very neutron-rich nucleus. A linear correlation between b(v) and b(s) is obtained in nuclei with different neutron-excess I, and b(v) of I > 7 nuclei is found to coincide with the results of infinite nuclear matter a(sym) = 32 +/- 4 MeV, and b(s)/b(v) of the nucleus is found to coincide with the results of the finite-range liquid-drop model results.

Published
2012
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3. Isoscaling in Statistical Sequential Decay Model

Author

Wen-Dong, Tian, primary, Yu-Gang, Ma, additional, Xiang-Zhou, Cai, additional, De-Qing, Fang, additional, Wei, Guo, additional, Chun-Wang, Ma, additional, Gui-Hua, Liu, additional, Wen-Qing, Shen, additional, Yu, Shi, additional, Qian-Min, Su, additional, Hong-Wei, Wang, additional, Kun, Wang, additional, and Ting-Zhi, Yan, additional

Published
2007
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4. Cross Sections of Elastic Electron and Positron Scattering from Proton-Rich Nuclei

Author

Er-Jun, Ma, primary, Yu-Gang, Ma, additional, Jin-Gen, Chen, additional, Xiang-Zhou, Cai, additional, De-Qing, Fang, additional, Wei, Guo, additional, Gui-Hua, Liu, additional, Chun-Wang, Ma, additional, Wen-Qing, Shen, additional, Yu, Shi, additional, Qian-Min, Su, additional, Wen-Dong, Tian, additional, Hong-Wei, Wang, additional, Kun, Wang, additional, and Ting-Zhi, Yan, additional

Published
2006
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5. One-Proton Halo Structure in 23 Al

Author

De-Qing, Fang, primary, Chun-Wang, Ma, additional, Yu-Gang, Ma, additional, Xiang-Zhou, Cai, additional, Jin-Gen, Chen, additional, Jin-Hui, Chen, additional, Wei, Guo, additional, Wen-Dong, Tian, additional, Kun, Wang, additional, Yi-Bin, Wei, additional, Ting-Zhi, Yan, additional, Chen, Zhong, additional, Jia-Xu, Zuo, additional, and Wen-Qing, Shen, additional

Published
2005
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6. Isoscaling Behaviour in the Isospin-Dependent Quantum Molecular Dynamics Model

Author

Wen-Dong, Tian, primary, Yu-Gang, Ma, additional, Xiang-Zhou, Cai, additional, Jin-Gen, Chen, additional, Jin-Hui, Chen, additional, De-Qing, Fang, additional, Wei, Guo, additional, Chun-Wang, Ma, additional, Guo-Liang, Ma, additional, Wen-Qing, Shen, additional, Kun, Wang, additional, Yi-Bin, Wei, additional, Ting-Zhi, Yan, additional, Chen, Zhong, additional, and Jia-Xu, Zuo, additional

Published
2005
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7. Investigation of Exotic Structure of the Largely Deformed Nucleus 23 Al in the Relativistic-Mean-Field Model

Author

Jin-Gen, Chen, primary, Xiang-Zhou, Cai, additional, Ting-Tai, Wang, additional, Yu-Gang, Ma, additional, Zhong-Zhou, Ren, additional, De-Qing, Fang, additional, Chen, Zhong, additional, Yi-Bin, Wei, additional, Wei, Guo, additional, Xing-Fei, Zhou, additional, Kun, Wang, additional, Guo-Liang, Ma, additional, Wen-Dong, Tian, additional, Jia-Xu, Zuo, additional, Chun-Wang, Ma, additional, Jin-Hui, Chen, additional, Ting-Zhi, Yan, additional, and Wen-Qing, Shen, additional

Published
2004
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8. Surface and Volume Symmetry Energy Coefficients of a Neutron-Rich Nucleus.

Author

Chun-Wang Ma, Ju-Bao Yang, Mian Yu, Jie PU, Shan-Shan Wang, and Hui-Ling Wei

Subjects
*SYMMETRY (Physics), *NEUTRONS, *SURFACE energy, *NUCLEAR liquid drop model, *NUCLEAR matter, *NUCLEAR physics experiments
Abstract

Using an isobaric method, the symmetry-energy coefficient (asym) of a neutron-rich nucleus is obtained from experimental binding energies. The shell effects are shown in a*symA ≡ 4asym/A of nuclei. A (sub)magic neutron magic number = 40 is suggested in a very neutron-rich nucleus, and * sym/ of a nucleus is found to decrease when its mass increases. The a*sym/A of a very neutron-rich nucleus with large mass saturates. The volumesymmetry coefficients (v) and surface-symmetry coefficients (bs) of a neutron-rich nucleus are extracted from a*sym/A by a correlation a*sym/A = bv/A-bs/A4/3. It is found that v and s decrease when the nucleus becomes more neutron-rich, and tend to saturate in the very neutron-rich nucleus. A linear correlation between v and s is obtained in nuclei with different neutron-excess, and bv of I > 7 nuclei is found to coincide with the results of infinite nuclear matter sym = 32±4MeV, and bs/bv of the nucleus is found to coincide with the results of the finite-range liquid-drop model results. [ABSTRACT FROM AUTHOR]

Published
2012
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9. One-Proton Halo Structure in <SUP>23</SUP>Al

Author

De-Qing, Fang, Chun-Wang, Ma, Yu-Gang, Ma, Xiang-Zhou, Cai, Jin-Gen, Chen, Jin-Hui, Chen, Wei, Guo, Wen-Dong, Tian, Kun, Wang, Yi-Bin, Wei, Ting-Zhi, Yan, Chen, Zhong, Jia-Xu, Zuo, and Wen-Qing, Shen

Abstract

The Glauber theory is used to investigate the reaction cross section of proton-rich nucleus 23Al. A core plus a proton structure is assumed for 23Al. HO-type density distribution is used for the core while the density distribution for the valence proton is calculated by solving the eigenvalue problem of Woods–Saxon potential. The transparency function in an analytical expression is obtained by adopting multi-Gaussian expansion for the density distribution. Coulomb correction and finite-range interaction are introduced. This modified Glauber model is suitable for halo nuclei. A dominate s-wave is suggested for the last proton in 23Al from our analysis which is possible in the calculation of relativistic mean-field theory.

Published
2005

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