WANG JianSong; SHEN WenQing; MA YuGang; CAI YanHuang; FENG Jun; FANG DeQing; CAI XiangZhou; SU QianMin

Chinese Physics C> 2000, Vol. 24> Issue(3) : 256-261

微观半经典Vlasov框架下的巨偶极共振的系统学与同位旋效应

CCAST World Laboratory, P. O. Box 8730, Beijing 100080, China2 Institute of Nuclear Research, The Chinese Academy of Sciences, Shanghai 201800, China3 T.D.Lee Physics Laboratory, Fudan University, Shanghai 2000433, China4 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China

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Abstract：
The systematics of the isovector Giant Dipole Resonance is studied via the microscopic semi-classical Vlasov method. The Woods-Saxon potential is used in the calculation with the different parameters for neutron and proton, respectively. It is found that the peak energies of the GDR strength distribution follow the empirical formula and agree with the experimental data. The GDR widths agree with the experimental data in the error bar. On the basis of these studies, we have investigated the GDR properties of Ca isotopes and three isomers with mass number A=40, 100 and 208. The studies show that the effects of isospin on the peak energies of the GDR strength distribution are small, Which rise slowly with the increase of (N-Z)/A. The isospin effects on the GDR width are not observed.

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[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]	HE Chuang-Ye , ZHU Li-Hua , WU Xiao-Guang , WANG Zhi-Min , LIU Ying , SUN Hui-Bin , WEN Shu-Xian , LI Guang-Sheng , YANG Chun-Xiang . Systematics of Signature Inversion in Odd-Odd Nuclei in the A～100 Mass Region. Chinese Physics C, 2006, 30(S2): 175-176.
[3]	DING Bin-Gang , LU Ding-Hui . Systematid study on the Even-Even nuclei and odd-A nuclei calculating error with Relativistic Mean-Field Theory. Chinese Physics C, 2006, 30(1): 38-43.
[4]	LIU Jian-Feng , JIA Min , ZHAO Wei-Juan . Study on the Giant Dipole Resonance Model for γ Production Mechanisms Induced by Fast Nutrons in the Nuclear Mass Region 180≤A≤210. Chinese Physics C, 2003, 27(5): 430-435.
[5]	WANG ShunJin , LUO HongGang . Microscopic Studies of Giant Resonance in Hot Nuclei——Damping of Giant Resonance and Thermodynamic Properties of Hot Nuclei. Chinese Physics C, 2000, 24(10): 955-961.
[6]	ZHOU Yong , LI JunQing , MA ZhongYu , CHEN BaoQiu . Drip-Line Nucleus of Z=59 Nuclei in the Relativistic Mean-Field Theory. Chinese Physics C, 2000, 24(10): 940-944.
[7]	ZHOU Yong , LI JunQing , MA ZhongYu , CHEN BaoQiu . Ground-State Properties of Z=59 Isotopic Chain in the Relativistic Mean-Field Theory. Chinese Physics C, 2000, 24(8): 748-754.
[8]	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.
[9]	Huang Wenhui , Wang Guangwei . Numerical Solution for Vlasov Equation. Chinese Physics C, 1999, 23(12): 1216-1222.
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Received: 1999-01-22
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

微观半经典Vlasov框架下的巨偶极共振的系统学与同位旋效应

Corresponding author: WANG JianSong,

CCAST World Laboratory, P. O. Box 8730, Beijing 100080, China2 Institute of Nuclear Research, The Chinese Academy of Sciences, Shanghai 201800, China3 T.D.Lee Physics Laboratory, Fudan University, Shanghai 2000433, China4 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China

Received Date: 1999-01-22

Accepted Date: 1900-01-01

Available Online: 2000-03-05

Abstract: The systematics of the isovector Giant Dipole Resonance is studied via the microscopic semi-classical Vlasov method. The Woods-Saxon potential is used in the calculation with the different parameters for neutron and proton, respectively. It is found that the peak energies of the GDR strength distribution follow the empirical formula and agree with the experimental data. The GDR widths agree with the experimental data in the error bar. On the basis of these studies, we have investigated the GDR properties of Ca isotopes and three isomers with mass number A=40, 100 and 208. The studies show that the effects of isospin on the peak energies of the GDR strength distribution are small, Which rise slowly with the increase of (N-Z)/A. The isospin effects on the GDR width are not observed.

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微观半经典Vlasov框架下的巨偶极共振的系统学与同位旋效应

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