Isospin splitting of the nucleon effective mass from giant resonances in Pb-208

doi:10.1103/PhysRevC.93.034335

	Isospin splitting of the nucleon effective mass from giant resonances in Pb-208
	Zhang, Zhen 1,2; Chen, Lie-Wen 1,2,3
刊名	PHYSICAL REVIEW C
	2016-03-29
卷号	93 页码:7
ISSN号	2469-9985
DOI	10.1103/PhysRevC.93.034335
英文摘要	Based on mean field calculations with Skyrme interactions, we extract a constraint on the isovector effective mass in nuclear matter at saturation density rho(0), i.e., m(v)* (rho(0)) = (0.77 +/- 0.03)m by combining the experimental data of the centroid energy of the isovector giant dipole resonance (IVGDR) and the electric dipole polarizability alpha(D) in Pb-208. Meanwhile, the isoscalar effective mass at rho(0) is determined to be m(s)* (rho(0)) = (0.91 +/- 0.05)m by analyzing the measured excitation energy of the isoscalar giant quadrupole resonance (ISGQR) in Pb-208. From the constrained m(s)* (rho(0)) and m(v)* (rho(0)), we obtain the isospin splitting of nucleon effective mass in asymmetric nuclear matter of isospin asymmetry delta at rho(0) as [m(n)* (rho(0), delta) - m(p)* (rho(0), delta)]/m = Delta m(1)* (rho(0))delta + O(delta(3)) with the linear isospin splitting coefficient Delta m(1)* (rho(0)) = 0.33 +/- 0.16. We notice that using the recently corrected data on the alpha(D) in Pb-208 with the contribution of the quasideuteron effect subtracted slightly enhances the isovector effective mass to m(v)* (rho(0)) = (0.80 +/- 0.03)m and reduces the linear isospin splitting coefficient to Delta m(1)* (rho(0)) = 0.27 +/- 0.15. Furthermore, the constraints on m(v)* (rho), m(s)* (rho), and Delta m(1)* (rho) at other densities are obtained from the similar analyses and we find that the Delta m(1)* (rho) increases with the density.
资助项目	Major State Basic Research Development Program[2013CB834405] ; Major State Basic Research Development Program[2015CB856904] ; NNSF of China[11275125] ; NNSF of China[11135011] ; "Shu Guang" project - Shanghai Municipal Education Commission ; Shanghai Education Development Foundation ; Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning ; Science and Technology Commission of Shanghai Municipality[11DZ2260700]
WOS关键词	HARTREE-FOCK APPROACH ; HEAVY-ION COLLISIONS ; NEUTRON-RICH MATTER ; SYMMETRY ENERGY ; CROSS-SECTIONS ; NORMAL DENSITY ; SUM-RULES ; DIFFERENCE ; CONSTRAINTS ; CHALLENGES
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000373105400002
资助机构	Major State Basic Research Development Program ; NNSF of China ; "Shu Guang" project - Shanghai Municipal Education Commission ; Shanghai Education Development Foundation ; Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning ; Science and Technology Commission of Shanghai Municipality
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/42148]
专题	中国科学院近代物理研究所
通讯作者	Chen, Lie-Wen
作者单位	1.Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China 2.Shanghai Jiao Tong Univ, Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China 3.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhen,Chen, Lie-Wen. Isospin splitting of the nucleon effective mass from giant resonances in Pb-208[J]. PHYSICAL REVIEW C,2016,93:7.
APA	Zhang, Zhen,&Chen, Lie-Wen.(2016).Isospin splitting of the nucleon effective mass from giant resonances in Pb-208.PHYSICAL REVIEW C,93,7.
MLA	Zhang, Zhen,et al."Isospin splitting of the nucleon effective mass from giant resonances in Pb-208".PHYSICAL REVIEW C 93(2016):7.