On Isospin Excitation Energy

LI Wen-Fei; ZHANG Feng-Shou; CHEN Lie-Wen

Chinese Physics C> 2001, Vol. 25> Issue(7) : 668-673

On Isospin Excitation Energy

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000,China2 Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China3 CCAST World Laboratory Beijing 100080, China

Abstract
HTML
Reference
Related

PDF

Abstract：
Within the framework of Hartree-Fock theory using the extended Skyrme effective interaction, the isospin excitation energy as a function of relative neutron excess δ was investigated at different temperatures and densities. It was found that the isospin excitation energy decreased with the increment of temperature and/or the decrement of density. We pointed out that the decrement of isospin excitation energy was resulted from the weakening of quantum effect with increment of temperature and/or decrement of density. Meanwhile, the relationship between the isospin excitation energy and the symmetry energy was discussed and found that the symmetry energy was just a part of the isospin excitation energy. With increasing temperature and decreasing density, the contribution of the symmetry energy to the isospin excitation energy becomes more and more important. The isospin excitation energy as a function of relative neutron excess was also investigated using different potential parameters. The result shows that the isospin excitation energy is almost independent of the incompressibility and the effective mass, but strongly depends on the symmetry energy strength coefficient, which indicates that it is possible to extract the symmetry energy of the nuclear equation of state by investigating the isospin excitation energy in experiments.

References

[1]

. Pochodzalla J.Phys.Rev.Lett.,1995,75(6) :10402. Kubo T .Nucl.Phys.Instrum.Methods In Phys.Res.,1992 ,B70:309 3. Geissel H .Nucl.Phys .Instrum.Methods In Phys.Res.,1992,B70:2864. Mueller A C ,Anne R .Nucl.Phys.Instrum .Methods In Phys.Res.,1991,B56 / 57:559 5. Sherrill B M .Nucl.Phys.Instrum .Methods In Phys.Res.,1992 ,B56 / 57:1106 6. ZHAN W L ,GUO Z Y ,XIAO G Q et al.Science in China ,1998,50(4) :21 7. ZHANG F S et al.Phys.Rev.,1999,C60 (12) :064604 8. ZHANG Feng-Shou,GE Ling-Xiao.Nuclear Multifragmentation.Beijing:Science Press,1998(in Chinese)(张丰收,葛凌霄.原子核多重碎裂.北京:科学出版社,1998)9. Ngo C ,Ngo H ,Leray S et al.Nucl.Phys.,1989,A499:148 10. ZHANG Feng-Shou GE Ling-Xiao.High Energy Phys.and Nucl.Phys.,1992,16:666 (in Chinese)(张丰收,葛凌霄.高能物理与核物理,1992,16:666) 11. Suraud E.Nucl.Phys.,1987,A462:10912. ZHANG F S.Z.Phys.,1996,A356:163

[1]	FANG De-Qing , MA Yu-Gang , MA Chun-Wang , ZHONG Chen , CAI Xiang-Zhou , CHEN Jin-Gen , GUO Wei , SU Qian-Min , TIAN Wen-Dong , WANG Kun , YAN Ting-Zhi , SHEN Wen-Qing . Systematic Behavior of Isospin Effect in Fragmentation Reactions. Chinese Physics C, 2007, 31(1): 59-64.
[2]	MA Yu-Gang , CAI Xiang-Zhou , FANG De-Qing , TIAN Wen-Dong , WANG Kun , ZHONG Chen . Isoscaling Analysis and Symmetry Energy. Chinese Physics C, 2006, 30(S2): 219-223.
[3]	FANG De-Qing , MA Yu-Gang , MA Chun-Wang , ZHONG Chen , CAI Xiang-Zhou , CHEN Jin-Gen , GUO Wei , SU Qian-Min , TIAN Wen-Dong , WANG Kun , YAN Ting-Zhi , SHEN Wen-Qing . Study of Isoscaling in Projectile Fragmentation and the Nuclear Symmetry Energy Coefficient. Chinese Physics C, 2006, 30(S2): 274-276.
[4]	LIU Jian-Ye , GUO Wen-Jun , Xing Yong-Zhong , LI Xi-Guo . Isospin Effect of Momentum Dependent Interaction in Heavy Ion Collisions. Chinese Physics C, 2005, 29(5): 456-460.
[5]	LI Zhu-Xia , ZHANG Ying-Xun , LI Qing-Feng , ZHAO Kai , WU Xi-Zhen . Isospin Effect in Intermediate Energy Heavy Ion Collisions. Chinese Physics C, 2004, 28(12): 1343-1348.
[6]	GUO Wen-Jun , LIU Jian-Ye , XING Yong-Zhong . Effect of Coulomb Interaction on Isospin Fractionation Process. Chinese Physics C, 2004, 28(8): 850-853.
[7]	XING Yong-Zhong , LIU Jian-Ye , GUO Wen-Jun . Isospin Effects in the Isospin Fractionation Process in Intermediate Energy HeavyIon Collisions. Chinese Physics C, 2004, 28(4): 403-407.
[8]	Falih H , LI Yan-Song , LONG Gui-Lu . Isospin and Mixed Symmetry Excitations in ^60—66Zn Isotopes. Chinese Physics C, 2004, 28(4): 370-376.
[9]	CHEN Lie-Wen , ZHANG Feng-Shou , MING Zhao-Yu , LI Wen-Fei , ZHU Zhi-Yuan . Isospin Dependence of Rotational Flow. Chinese Physics C, 2001, 25(4): 329-335.
[10]	ZHANG Feng-Shou , CHEN Lie-Wen , LI Wen-Fei , ZHU Zhi-Yuan . Isospin Dependence of Squeeze-out Flow. Chinese Physics C, 2001, 25(5): 412-416.
[11]	SU QianMin , MA YuGang , SHEN WenQing , WAGN JianSong , CAI XiangZhou , FANG DeQing . Isospin Effect on the Yield of Light Particles and Their Correlations. Chinese Physics C, 2000, 24(3): 250-255.
[12]	CHEN Bo , LIU JianYe , ZHANG FengShou , CHEN LieWen , ZHAO Qiang , ZUO Wei . Isospin Effects on Multifragmentation of Light Mass System. Chinese Physics C, 2000, 24(3): 244-249.
[13]	CHEN LieWen , ZHANG FengShou , JIN GenMing , LIU JianYe , ZHU ZhiYuan . Isospin Effects on Radial Expansion Flow. Chinese Physics C, 2000, 24(2): 153-159.
[14]	MING ZhaoYu , ZHANG FengShou , CHEN LieWen , ZHU ZhiYuan , ZHAN WenLong , GUO ZhongYan , XIAO GuoQing . Isospin Dependent Boltzmann-Langevin Equation and the Production Cross Section of ¹⁹Na. Chinese Physics C, 2000, 24(7): 656-661.
[15]	Chu Zili , Zheng Yuming . Simulation of Heavy-Ion Collision With Isospi-Separated RVUU Model. Chinese Physics C, 1998, 22(5): 429-433.
[16]	Zhang Zhanjun , Liu Yong , Sang Jianping . Microscopic Study of Low-Lying States of Even ^190─200Pt Isotopes. Chinese Physics C, 1998, 22(9): 836-843.
[17]	Yang Chunbin , Cai Xu , Zhou Zhuowei . Constraint of Isospin Conservation on Strangeness Production. Chinese Physics C, 1996, 20(11): 991-996.
[18]	Zhu Quanling , Ge Lingxiao , Zhang Xiaodong . Isospin Effects on Dynamics of Heavy Ion Collisions. Chinese Physics C, 1994, 18(9): 853-857.
[19]	LI Zhu-Xia , ZHANG Xi-Zhen . A STUDY OF THE ISOSCALAR GIANT RESONANCE IN ⁴⁰Ca. Chinese Physics C, 1986, 10(3): 330-334.
[20]	Xu Jiao-lin , Wu Yong-shi , Chen Shi , Guo Han-ying . ISOSPIN CIASSIFICATION OF HADRONS BY FINITE GROUP. Chinese Physics C, 1980, 4(2): 251-255.

Access

Get Citation

LI Wen-Fei, ZHANG Feng-Shou and CHEN Lie-Wen. On Isospin Excitation Energy[J]. Chinese Physics C, 2001, 25(7): 668-673.

LI Wen-Fei, ZHANG Feng-Shou and CHEN Lie-Wen. On Isospin Excitation Energy[J]. Chinese Physics C, 2001, 25(7): 668-673. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2000-06-20
Revised: 1900-01-01

Article Metric

Article Views(2624)
PDF Downloads(633)
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

On Isospin Excitation Energy

Corresponding author: LI Wen-Fei,

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000,China2 Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China3 CCAST World Laboratory Beijing 100080, China

Received Date: 2000-06-20

Accepted Date: 1900-01-01

Available Online: 2001-07-05

Abstract: Within the framework of Hartree-Fock theory using the extended Skyrme effective interaction, the isospin excitation energy as a function of relative neutron excess δ was investigated at different temperatures and densities. It was found that the isospin excitation energy decreased with the increment of temperature and/or the decrement of density. We pointed out that the decrement of isospin excitation energy was resulted from the weakening of quantum effect with increment of temperature and/or decrement of density. Meanwhile, the relationship between the isospin excitation energy and the symmetry energy was discussed and found that the symmetry energy was just a part of the isospin excitation energy. With increasing temperature and decreasing density, the contribution of the symmetry energy to the isospin excitation energy becomes more and more important. The isospin excitation energy as a function of relative neutron excess was also investigated using different potential parameters. The result shows that the isospin excitation energy is almost independent of the incompressibility and the effective mass, but strongly depends on the symmetry energy strength coefficient, which indicates that it is possible to extract the symmetry energy of the nuclear equation of state by investigating the isospin excitation energy in experiments.

HTML

Reference (1)

On Isospin Excitation Energy

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article