Superscaling analysis of the Coulomb sum rule in quasielastic electron-nucleus scattering

被引：11
|
作者：
Caballero, J. A. [1 ]
Martinez, M. C. [2 ]
Herraiz, J. L. [2 ]
Udias, J. M. [2 ]
机构：
[1] Univ Seville, Dept Fis Atom Mol & Nucl, E-41080 Seville, Spain
[2] Univ Complutense Madrid, Dept Fis Atom Mol & Nucl, Grp Fis Nucl, E-28040 Madrid, Spain
来源：
PHYSICS LETTERS B | 2010年 / 688卷 / 2-3期
关键词：
Inclusive quasielastic electron scattering; Scaling; Superscaling; Relativistic mean field; Coulomb sum rule; POLARIZATION;
D O I：
10.1016/j.physletb.2010.03.078
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The Coulomb sum rule for inclusive quasielastic electron scattering in C-12, Ca-40 and Fe-56 is analyzed based on scaling and superscaling properties. Results obtained in the relativistic impulse approximation with various descriptions of the final state interactions are shown. A comparison with experimental data measured at Bates and Saclay is provided. The theoretical description based on strong scalar and vector terms present in the relativistic mean field, which has been shown to reproduce the experimental asymmetric superscaling function, leads to results that are in fair agreement with Bates data while it sizeably overestimates Saclay data. We find that the Coulomb sum rule for a momentum transfer q >= 500 MeV/c saturates to a value close to 0.9, being very similar for the three nuclear systems considered. This is in accordance with Bates data, which indicates that these show no significative quenching in the longitudinal response. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：250 / 257
页数：8
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