## Abstract

The neutron-to-proton density ratio at the nuclear periphery was determined for six targets from the yield of nuclei with mass [Formula Presented] generated by antiproton annihilation on targets with mass number [Formula Presented] A new setup allowed us to measure this yield for nuclei with half-lives down to 6 s. The experiment confirmed the negative correlation between the peripheral neutron-to-proton density ratio and the neutron binding energy, which had been previously found. Results of Hartree-Fock-Bogoliubov and relativistic Hartree-Bogoliubov calculations show good agreement for a large number of nuclei. By comparing the measured values with those derived from Hartree-Fock-Bogoliubov calculations, the ratio R of the imaginary parts of the effective scattering lengths of antiprotons on bound neutrons and protons was deduced to be [Formula Presented] For the first time yields of several excited states of some [Formula Presented] nuclei have been investigated.

Original language | English |
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Pages (from-to) | 9 |

Number of pages | 1 |

Journal | Physical Review C - Nuclear Physics |

Volume | 60 |

Issue number | 5 |

DOIs | |

State | Published - 1999 |