Nuclear Physics and Atomic Energy

ядерна ф≥зика та енергетика
Nuclear Physics and Atomic Energy

  ISSN: 1818-331X (Print), 2074-0565 (Online)
  Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine
  Languages: Ukrainian, English, Russian
  Periodicity: 4 times per year

  Open access peer reviewed journal


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Nucl. Phys. At. Energy 2016, volume 17, issue 1, pages 5-11.
Section: Nuclear Physics.
Received: 02.09.2015; Accepted: 11.04.2016; Published online: 02.06.2016.
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Neutron skin and halo in medium and heavy nuclei within the extended Thomas - Fermi theory

S. V. Lukyanov*, A. I. Sanzhur

Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine

*Corresponding author. E-mail address: lukyanov@kinr.kiev.ua.

Abstract: The neutron skin and halo distributions in medium and heavy nuclei are calculated within the extended Thomas - Fermi approximation. Calculations are carried out for the effective Skyrme-like forces using the direct variational method. The analytical expression for the isovector shift of the rms radii Δrnp as a sum of skin- and halo-like terms is obtained. The contribution of halo and skin terms to Δrnp are found to be approximately equal.

Keywords: neutron skin, neutron halo, Thomas - Fermi theory, variational method, Skyrme forces.

References:

1. M. Warda, X. Vinas, X. Roca-Maza, M. Centelles. Analysis of bulk and surface contributions in the neutron skin of nuclei. Phys. Rev. C 81 (2010) 054309. https://doi.org/10.1103/PhysRevC.81.054309

2. D.A. Kirzhnitz. Field Theoretical Methods in Many Body Systems (London: Pergamon, 1967).

3. M. Brack, C. Guet, H.-B. Hakansson. Selfconsistent semiclassical description of average nuclear properties - a link between microscopic and macroscopic models. Phys. Rep. 123 (1985) 275. https://doi.org/10.1016/0370-1573(86)90078-5

4. V.M. Kolomietz. Nuclear Fermi-Liquid (Kyiv: Nauk. Dumka, 2009) 414 p. (Rus) http://www.prometeus.nsc.ru/acquisitions/11-08-30/cont03f.ssi

5. V.M. Kolomietz, A.I. Sanzhur. Equation of state and symmetry energy within the stability valley. Eur. Phys. J. A 38 (2008) 345. https://doi.org/10.1140/epja/i2008-10679-1

6. S. Mizutori, J. Dobaczewski, G.A. Lalazissis et al. Nuclear skins and halos in the mean-field theory. Phys. Rev. C 61 (2000) 044326. https://doi.org/10.1103/PhysRevC.61.044326

7. A. Trzcinska, J. Jastrzebsky, P. Lubinski et al. Neutron density distributions deduced from antiprotonic atoms. Phys. Rev. Lett. 87 (2001) 082501. https://doi.org/10.1103/PhysRevLett.87.082501

8. W.M. Bugg, G.T. Condo, E.L. Hart et al. Evidence for a neutron halo in heavy nuclei from antiproton absorp-tion. Phys. Rev. Lett. 31 (1973) 475. https://doi.org/10.1103/PhysRevLett.31.475