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题名: Validity of the relativistic impulse approximation for elastic proton-nucleus scattering at energies lower than 200 MeV
作者: Li, Z. P. ;  Hillhouse, G. C. ;  Meng, J.
刊名: PHYSICAL REVIEW C
出版日期: 2008
卷号: 78, 期号:1, 页码:-
关键词: REACTION CROSS-SECTIONS ;  MEAN-FIELD THEORY ;  LORENTZ COVARIANT REPRESENTATION ;  GROUND-STATE PROPERTIES ;  NN INTERACTION ;  INTERMEDIATE ENERGIES ;  POLARIZED PROTONS ;  OPTICAL-MODEL ;  EXOTIC NUCLEI ;  PB-208
学科分类: Physics
通讯作者: Li, ZP , Peking Univ, Sch Phys, Beijing 100871, Peoples R China
部门归属: [Li, ZP; Hillhouse, GC; Meng, J] Peking Univ, Sch Phys, Beijing 100871, Peoples R China; [Hillhouse, GC; Meng, J] Univ Stellenbosch, Dept Phys, ZA-7600 Stellenbosch, South Africa; [Meng, J] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; [Meng, J] Natl Lab Heavy Ion Accelerator, Ctr Theory Nucl Phys, Lanzhou 730000, Peoples R China
英文摘要: We present the first study to examine the validity of the relativistic impulse approximation (RIA) for describing elastic proton-nucleus scattering at incident laboratory kinetic energies lower than 200 MeV. For simplicity we choose a (208)Pb target, which is a spin-saturated spherical nucleus for which reliable nuclear structure models exist. Microscopic scalar and vector optical potentials are generated by folding invariant scalar and vector scattering nucleon-nucleon (NN) amplitudes, based on our recently developed relativistic meson-exchange model, with Lorentz scalar and vector densities resulting from the accurately calibrated PK1 relativistic mean field model of nuclear structure. It is seen that phenomenological Pauli blocking (PB) effects and density-dependent corrections to sigma N and omega N meson-nucleon coupling constants modify the RIA microscopic scalar and vector optical potentials so as to provide a consistent and quantitative description of all elastic scattering observables, namely, total reaction cross sections, differential cross sections, analyzing powers and spin rotation functions. In particular, the effect of PB becomes more significant at energies lower than 200 MeV, whereas phenomenological density-dependent corrections to the NN interaction also play an increasingly important role at energies lower than 100 MeV.
资助者: Major State Basic Research Developing Program[2007CB815000]; National Natural Science Foundation of China[10435010, 10775004, 10221003]; National Research Foundation of South Africa[2054166]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000258636200039
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5510
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Li, Z. P.,Hillhouse, G. C.,Meng, J.. Validity of the relativistic impulse approximation for elastic proton-nucleus scattering at energies lower than 200 MeV[J]. PHYSICAL REVIEW C,2008,78(1):-.
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