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Neutron Density Distributions Deduced from Antiprotonic Atoms

A. Trzcińska, J. Jastrzȩbski, P. Lubiński, F. J. Hartmann, R. Schmidt, T. von Egidy, and B. Kłos
Phys. Rev. Lett. 87, 082501 – Published 2 August 2001
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Abstract

The differences between neutron and proton density distributions at large nuclear radii in stable nuclei were determined. Two experimental methods were applied: nuclear spectroscopy analysis of the antiproton annihilation residues one mass unit lighter than the target mass and the measurements of strong-interaction effects on antiprotonic x rays. Assuming the validity of two-parameter Fermi neutron and proton distributions at these large radii, the conclusions are that the two experiments are consistent with each other and that for neutron rich nuclei it is mostly the neutron diffuseness which increases and not the half-density radius. The obtained neutron and proton rms radii differences are in agreement with previous results.

  • Received 28 March 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.082501

©2001 American Physical Society

Authors & Affiliations

A. Trzcińska, J. Jastrzȩbski, and P. Lubiński

  • Heavy Ion Laboratory, Warsaw University, PL-02-093 Warsaw, Poland

F. J. Hartmann, R. Schmidt, and T. von Egidy

  • Physik-Department, Technische Universität München, D-85747 Garching, Germany

B. Kłos

  • Physics Department, Silesian University, PL-40-007 Katowice, Poland

See Also

Antiprotons Map Nuclear Surface

Geoff Brumfiel
Phys. Rev. Focus 8, 11 (2001)

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Issue

Vol. 87, Iss. 8 — 20 August 2001

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