Charge-exchange reaction induced by 6He and nuclear densities

doi:10.1016/S0375-9474(98)00470-9

Nuclear Physics A

Volume 641, Issue 3, 19 October 1998, Pages 263-270

https://doi.org/10.1016/S0375-9474(98)00470-9 Get rights and content

Abstract

The charge-exchange reaction p(⁶He, ⁶Li)n is studied in reverse kinematics with a secondary ⁶He beam at 41.6 MeV/nucleon. The transition connecting the ground state of ⁶He to its isobaric analog state in ⁶Li has been measured and analyzed in the context of a microscopic calculation. The angular distribution is shown to be sensitive to the nuclear interaction potential and to the radii of the density distribution of ⁶He. It is shown that only a coherent microscopic analysis may disentangle the different contributions.

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A systematic study of elastic proton and neutron scattering as well as (p,n) charge exchange reactions was undertaken in the context of the JLM microscopic framework in order to test the isovector part of the potential. The study included the stable nuclei ⁴⁸Ca, ⁹⁰Zr, ¹²⁰Sn and ²⁰⁸Pb in the energy range of ∼25–45 MeV and the halo nucleus ⁶He at ∼40 MeV. It was found that the stable nuclei data can be reproduced, by an adjustment of the isovector part through a renormalization factor, λ_isov∼2–2.5. The required isovector adjustment for the halo nucleus data will be discussed.

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¹: Present address: GSI, Postfach 110552, D-64220 Darmstadt, Germany.

²: Present address: Nucl. Phys. Lab., Univ. of Washington, Seattle, WA 98195, USA.

³: Present address: NSCL, Michigan State University, East Lansing, MI 48824, USA.

⁴: Present address: Oregon State University, 100 Radiation Center, Corvallis, OR 97331-5903, USA.

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Nuclear Physics A

Abstract

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Cited by (18)

Energy levels of light nuclei A = 5, 6, 7

Folding model analysis of elastic and inelastic proton scattering on sulfur isotopes

First observation of neutron-proton halo structure for the 3.563 MeV 0<sup>+</sup> state in <sup>6</sup>Li via <sup>1</sup>H(<sup>6</sup>He, <sup>6</sup>Li)n reaction

Probing the <sup>6</sup>He halo structure with elastic and inelastic proton scattering

Results and techniques of measurements with inverse kinematics

Isospin dependence of the microscopic JLM model