Neutron skin deduced from antiprotonic atom data

B. Alex Brown, G. Shen, G. C. Hillhouse, J. Meng, and A. Trzcińska
Phys. Rev. C 76, 034305 – Published 6 September 2007

Abstract

The relationship between the nucleon density at large radii and the value of the rms radius is investigated in the framework of Skyrme Hartree-Fock and relativistic mean-field models. From a comparison to the charge density we constrain the models in terms of the nuclear matter incompressibility and effective mass properties required to reproduce the density shape. The results are used to extract the rms neutron radius for Pb208 from antiprotonic atom data. The result for the difference between the neutron and proton rms radii, the so-called neutron-skin thickness, is S=0.20(±0.04)(±0.05) fm, where ±0.04 fm is experimental error from the antiprotonic line width, and ±0.05 fm is the theoretical error suggested from the comparison of the models with the experimental charge density.

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  • Received 2 February 2006

DOI:https://doi.org/10.1103/PhysRevC.76.034305

©2007 American Physical Society

Authors & Affiliations

B. Alex Brown1,4, G. Shen2,3, G. C. Hillhouse2,4, J. Meng2,4,5,6, and A. Trzcińska7

  • 1Department of Physics and Astronomy, National Superconducting Cyclotron Laboratory, and Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824-1321, USA
  • 2School of Physics, Peking University, Beijing 100871, People's Republic of China
  • 3Department of Physics, Indiana University Bloomington, Indiana 47405, USA
  • 4Department of Physics, University of Stellenbosch, Stellenbosch, South Africa
  • 5Institute of Theoretical Physics, Chinese Academy of Science, Beijing 100080, People's Republic of China
  • 6Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, People's Republic of China
  • 7Heavy Ion Laboratory, Warsaw University, PL-02-093 Warsaw, Poland

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Issue

Vol. 76, Iss. 3 — September 2007

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