Isospin Effects on Pre-Equilibrium Nucleon Emission in Heavy-Ion Collisions

Chen Liewen; Zhang Xiaodong; Ge Lingxiao

Chinese Physics C> 1997, Vol. 21> Issue(S1) : 465-470

Isospin Effects on Pre-Equilibrium Nucleon Emission in Heavy-Ion Collisions

Institute of Modem Physics, Chinese Academy of Sciences, Lanzhou, China

Abstract
HTML
Reference
Related

PDF

Abstract：
The isospin-dependent symmetry energy, Coulomb energy, and N-N cross sections are considered in the quantum molecular dynamics model. The influence of isospin effects on the emission of nucleons is discussed in the head-on collisions of the system ⁴⁰Ar + ⁴⁰Ar at the incident energy of 25 MeV/u. It is observed that the ratio of neutron to proton of pre-equilibrium emission is higher than that of the reaction system. It is found that the symmetry energy enhances the emission of neutron but reduces the emission of proton and that the isospin-dependent N-N cross sections favor the emission of both proton and neutron, but they seem to be more beneficial to the emission of protons.
- pre-equilibrium emission ,
- isospin effects ,
- nucleon-nucleon cross sections ,
- symmetry energy

[1]	. ³H and ³He nuclei production in a combined thermal and coalescence framework for heavy-ion collisions in the few-GeV energy regime. Chinese Physics C, 2026, 50(1): 014104. doi: 10.1088/1674-1137/ae099a
[2]	Lu Feng , Tao Han , Jing-Fei Zhang , Xin Zhang . Prospects for searching for sterile neutrinos in dynamical dark energy cosmologies using joint observations of gravitational waves and γ-ray bursts. Chinese Physics C, 2026, 50(1): 1-12. doi: 10.1088/1674-1137/ae0b43
[3]	Jialin He , Xinye Peng , Zhongbao Yin , Liang Zheng . Extracting the kinetic freeze-out properties of high energy pp collisions at the LHC with event shape classifiers. Chinese Physics C, 2026, 50(2): 1-16.
[4]	Jun Wang , Qiang Zhao . Predictions for the isospin-violating decays of ${{\boldsymbol B}_{\boldsymbol c}({\boldsymbol{1P}})^{\bf +}\bf\to{\boldsymbol B}_{\boldsymbol c}^{({\bf *})+}\boldsymbol\pi^{\bf 0}}$. Chinese Physics C, 2026, 50(2): 1-11.
[5]	Abdel Magied DIAB . Charmed meson structure across crossover from SU(4) Polyakov quark meson model with isospin asymmetry. Chinese Physics C, 2026, 50(1): 013101. doi: 10.1088/1674-1137/ae042d
[6]	Huixiao Duan , Fan Zhang , Kailei Wang , Jun Su . Nuclear temperature of spectator source extracted by neutron spectra in ¹²⁴Sn,¹⁰⁷Sn + ¹²⁰Sn collisions at 600 MeV/nucleon. Chinese Physics C, 2026, 50(2): 1-10.
[7]	Hua Chen . Globally Stable Dark Energy in F(R) Gravity. Chinese Physics C, 2026, 50(2): 1-15.
[8]	Wang-Fa Li , Junmou Chen , Qian-Jiu Wang , Zhao-Huan Yu . A Numerical Study on Gauge Symmetry of Electroweak Amplitudes. Chinese Physics C, 2026, 50(2): 1-16.
[9]	Ronghao Hu , Qike Gu , Kejian Shi , Zezhong Wei , Meng Lv , Shiyang Zou , Yongkun Ding . Polarized neutron beams from polarized deuterium-tritium fusion with applications to magnetic field imaging in high-energy-density plasmas. Chinese Physics C, 2025, 49(12): 124102. doi: 10.1088/1674-1137/adec4f
[10]	Hao-Qiao Li , Hai-Ning Yan , Jiayin Gu , Xiao-Ze Tan . Probing Z/W pole physics at high-energy muon colliders via vector-boson-fusion processes. Chinese Physics C, 2025, 49(10): 103102. doi: 10.1088/1674-1137/addfcd
[11]	Bo Lan , Qin-Ze Song , Jin-Huan Sheng , Yi Qiao , Ru-Min Wang . Study of χ_cJ (J = 0,1,2) decays to light meson pairs based on SU(3) flavor symmetry/breaking analysis. Chinese Physics C, 2025, 49(12): 123106. doi: 10.1088/1674-1137/adff00
[12]	. SU(3) flavor symmetry analysis of hyperon non-leptonic two body decays. Chinese Physics C, 2025, 49(12): 123101. doi: 10.1088/1674-1137/adf1f1
[13]	Yu-Chen Wu , Man Bao . Low-lying states of odd-even N = 79 isotones within the nucleon-pair approximation. Chinese Physics C, 2025, 49(12): 124109. doi: 10.1088/1674-1137/adf1f6
[14]	Yiming Gao , Yoshiki K. Tanaka , Vasyl Drozd , Hiroyuki Ekawa , Samuel Escrig , Yan He , Ayumi Kasagi , Enqiang Liu , Manami Nakagawa , Christophe Rappold , Takehiko R. Saito , Ryohei Sekiya , He Wang , Ayari Yanai , Xiaohong Zhou . Feasibility study of measuring interaction cross sections of hypernuclei produced in projectile fragmentation reactions with WASA-FRS setup. Chinese Physics C, 2025, 49(12): 124003. doi: 10.1088/1674-1137/adf4b2
[15]	Qu-Zhi Li , Zhiguang Xiao , Han-Qing Zheng . On the pole trajectory of the subthreshold negative parity nucleon with varying pion masses. Chinese Physics C, 2025, 49(12): 123103. doi: 10.1088/1674-1137/adfa02
[16]	Jian Liu , Qiang Su , Qinglin Niu , Lei Wang , Zhongzhou Ren . Charged-current quasielastic neutrino scattering off nuclei with nucleon-nucleon short-range correlations. Chinese Physics C, 2025, 49(10): 104102. doi: 10.1088/1674-1137/ade126
[17]	Hanmei Cao , Fanglei Zou , Xiaojun Sun , Jingshang Zhang . Effects of energy levels on the double-differential cross sections of outgoing charged particles for the n+¹⁹F reaction below 20 MeV. Chinese Physics C, 2025, 49(12): 124107. doi: 10.1088/1674-1137/adf49f
[18]	HUANG Jiang , XIONG Yong-Qian , CHEN De-Zhi , LIU Kai-Feng , YANG Jun , LI Dong , YU Tiao-Qin , FAN Ming-Wu , YANG Bo . A permanent magnet electron beam spread system used fora low energy electron irradiation accelerator. Chinese Physics C, 2014, 38(10): 107008. doi: 10.1088/1674-1137/38/10/107008
[19]	LIU Chang-Long , LU Yi-Ying , YIN LI . Effects of Additional Vacancy-Like Defects Produced by Ion Impealations on Boron Thermal Diffusion in Silicon. Chinese Physics C, 2005, 29(11): 1107-1111.
[20]	Yang Jianjun , Ma Boqiang , Li Guanglie . Non-perturbative Quark Propagator and the Study of the Non-trivial Q² Dependence in the Nucleon Structure Functions. Chinese Physics C, 1997, 21(2): 146-156.

Access

Get Citation

Chen Liewen, Zhang Xiaodong and Ge Lingxiao. Isospin Effects on Pre-Equilibrium Nucleon Emission in Heavy-Ion Collisions[J]. Chinese Physics C, 1997, 21(S1): 465-470.

Chen Liewen, Zhang Xiaodong and Ge Lingxiao. Isospin Effects on Pre-Equilibrium Nucleon Emission in Heavy-Ion Collisions[J]. Chinese Physics C, 1997, 21(S1): 465-470. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1995-12-20

Fund

Supported by the National Natural Science Foundation of China and LWTZ-1298, the Chinese Academy of Sciences.

Article Metric

Article Views(1084)
PDF Downloads(2)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Isospin Effects on Pre-Equilibrium Nucleon Emission in Heavy-Ion Collisions

Institute of Modem Physics, Chinese Academy of Sciences, Lanzhou, China

Received Date: 1995-12-20

Fund Project: Supported by the National Natural Science Foundation of China and LWTZ-1298, the Chinese Academy of Sciences.

Abstract: The isospin-dependent symmetry energy, Coulomb energy, and N-N cross sections are considered in the quantum molecular dynamics model. The influence of isospin effects on the emission of nucleons is discussed in the head-on collisions of the system ⁴⁰Ar + ⁴⁰Ar at the incident energy of 25 MeV/u. It is observed that the ratio of neutron to proton of pre-equilibrium emission is higher than that of the reaction system. It is found that the symmetry energy enhances the emission of neutron but reduces the emission of proton and that the isospin-dependent N-N cross sections favor the emission of both proton and neutron, but they seem to be more beneficial to the emission of protons.

Isospin Effects on Pre-Equilibrium Nucleon Emission in Heavy-Ion Collisions

Abstract：

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

Isospin Effects on Pre-Equilibrium Nucleon Emission in Heavy-Ion Collisions

HTML

目录