Probing nuclear skins and halos with elastic electron scattering

The elastic electron scattering form factors, longitudinal and transverse, from the He and Li isotopes and from 8 B have been studied. Large space shell model functions have been assumed. The precise distribution of the neutron excess has little effect on the form factors of the isotopes though there is a mass dependence in the charge densities. However, the form factors of the proton-rich nucleus, 8 B, are significantly changed by the presence of the proton halo.

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“…Rather, it is due only to the coupling of the 4 extra neutrons to the 7 Li core. A similar conclusion has been reached by Bertulani [7].…”

supporting

confidence: 87%

“…However, they did not make any conclusion as to the role of the neutron halo character of 6 He. That role, of the halo in elastic electron scattering, was sought more recently by Bertulani [7]. He also used the Helm model and found that the contribution from the neutron halo itself was insignificant.…”

mentioning

confidence: 94%

Electron scattering form factors from exotic nuclei

Karataglidis

Amos

2007

Physics Letters B

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“…But as already noticed [20], the rms radii (second moments of the densities) provide a very limited description of the nucleon density distributions. A more effective tool to analyze skins [20,34] is the Helm model [32,33]. This is a model that allows one to extract from the form factor in a simple way the two main characteristics of the density: a diffraction radius and a surface thickness.…”

Section: B Form Factors and Diffraction Parametersmentioning

confidence: 99%

“…The latter was shown to have a smooth gradual dependence on the neutron excess and to be almost unaffected by shell effects. The Helm model was used very recently also by Bertulani [34] to investigate electron scattering from light unstable nuclei.…”

Section: Introductionmentioning

confidence: 99%

Nuclear skin emergence in Skyrme deformed Hartree-Fock calculations

et al. 2007

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A study of the charge and matter densities and the corresponding rms radii for even-even isotopes of Ni, Kr, and Sn has been performed in the framework of the deformed self-consistent mean-field Skyrme HF+BCS method. The resulting charge radii and neutron skin thicknesses of these nuclei are compared with available experimental data, as well as with other theoretical predictions. The formation of a neutron skin, which manifests itself in an excess of neutrons at distances greater than the radius of the proton distribution, is analyzed in terms of various definitions. Formation of a proton skin is shown to be unlikely. The effects of deformation on the neutron skins in even-even deformed nuclei far from the stability line are discussed.

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“…Collective vibrations of nuclei are also a good tool to investigate the symmetry energy. Some features of neutron rich nuclei are also though to be very sensitive to the the symmetry energy, such as their neutron skin ∆r = r p − r n , where r p(n) is the proton (neutron) matter distribution [289,290]. Collective vibrations in neutron-rich nuclei at low energies are usually so-called Pigmy Resonances or Ikeda resonances [188,191,[291][292][293].…”

Section: A Collective Resonances Neutron Skins and Neutron Starsmentioning

confidence: 99%

Current Status of Nuclear Physics Research

Bertulani

Hussein

2015

Braz J Phys

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In this review we discuss the current status of research in nuclear physics which is being carried out in different centers in the World. For this purpose we supply a short account of the development in the area which evolved over the last 9 decades, since the discovery of the neutron. The evolution of the physics of the atomic nucleus went through many stages as more data become available. We briefly discuss models introduced to discern the physics behind the experimental discoveries, such as the shell model, the collective model, the statistical model, the interacting boson model, etc., some of these models may be seemingly in conflict with each other, but this was shown to be only apparent.The richness of the ideas and abundance of theoretical models attests to the important fact that the nucleus is a really singular system in the sense that it evolves from two-body bound states such as the deuteron, to few-body bound states, such as 4 He, 7 Li, 9 Be etc. and up the ladder to heavier bound nuclei containing up to more than 200 nucleons. Clearly statistical mechanics, usually employed in systems with very large number of particles, would seemingly not work for such finite systems as the nuclei, neither do other theories which are applicable to condensed matter. The richness of nuclear physics stems from these restrictions. New theories and models are presently being developed. Theories of the structure and reactions of neutron-rich and proton-rich nuclei, called exotic nuclei, halo nuclei, or Borromean nuclei, deal with the wealth of experimental data that became available in the last 35 years. Further, nuclear astrophysics and stellar and Big Bang nucleosynthesis have become a more mature subject. Due to limited space, this review only covers a few selected topics, mainly those with which the authors have worked on. Our aimed potential readers of this review are nuclear physicists and physicists in other areas, as well as graduate students interested in pursuing a career in nuclear physics.

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Probing nuclear skins and halos with elastic electron scattering

Cited by 42 publications

References 43 publications

Electron scattering form factors from exotic nuclei

Electron scattering form factors from exotic nuclei

Nuclear skin emergence in Skyrme deformed Hartree-Fock calculations

Current Status of Nuclear Physics Research

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