Evidence for a neutron excess in the surface of heavy nuclei from A K− meson capture study

Davis, D. H.; Lovell, S.P.; Csejthey-Barth, M.; Sacton, J.; Schorochoff, G.; O’Reilly, M.

doi:10.1016/0550-3213(67)90112-5

Cited by 46 publications

(8 citation statements)

References 9 publications

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Section: A Peripheral Neutron To Proton Density Ratiomentioning

confidence: 97%

“…The systematics presented in Fig. 3 shows that the nuclei with smaller neutron binding energy exhibit, on the contrary, a periphery rich in neutrons -a "neutron halo" in the terminology introduced more than a quarter of a century ago [2,5,9]. Figure 4 shows, as a function of the target mass, another observable of the present experiment, namely the absolute yield (per 1000 antiprotons) of the production of nuclei with one nucleon less than the target mass.…”

Section: A Peripheral Neutron To Proton Density Ratiomentioning

confidence: 99%

“…These characteristics are governed by the hadron -nucleus interaction potential depending in turn on the matter density where the interaction occurred. In the second type of experiments also involving the formation of hadronic atoms, the characteristics of the hadron annihilation products -mesonic [2,8,9] or nuclear [12] -are studied. The formation and nature of these products depend not only on the nuclear density distribution but are also related to the neutron to proton density ratio.…”

Section: Introductionmentioning

confidence: 99%

“…There is a growing experimental evidence [1][2][3][4][5][6][7][8][9][10][11][12][13][14] that the outer periphery of many stable isotopes of heavy elements is composed predominantly of neutrons. Although this is in agreement with simple [15] as well as sophisticated [16] nuclear models, its recognition could only rarely be found in the literature [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Composition of the nuclear periphery from antiproton absorption

et al. 1998

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Thirteen targets with mass numbers from 58 to 238 were irradiated with the antiproton beam from the Low Energy Antiproton Ring facility at CERN leading to the formation of antiprotonic atoms of these heavy elements. The antiproton capture at the end of atomic cascade results in the production of more or less excited residual nuclei. The targets were selected with the criterion that both reaction products with one nucleon less than the proton and neutron number of the target are radioactive. The yield of these radioactive products after stopped-antiproton annihilation was determined using gamma-ray spectroscopy techniques. This yield is related to the proton and neutron density in the target nucleus at radial distance corresponding to the antiproton annihilation site. The experimental data clearly indicate the existence of a neutron rich nuclear periphery, a "neutron halo", strongly correlated with the target neutron separation energy Bn, and observed for targets with Bn < 10 MeV. For two target nuclei, 106 Cd and 144 Sm, with larger neutron binding energies a proton rich nuclear periphery was observed. Most of the experimental data are in reasonable agreement with calculations based on current antiproton-nucleus and pion-nucleus interaction potentials and on nuclear densities deduced with the help of the Hartree-Fock-Bogoliubov approach. This approach was, however, unable to account for the 106 Cd and 144 Sm results.

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Section: A Peripheral Neutron To Proton Density Ratiomentioning

confidence: 97%

Section: A Peripheral Neutron To Proton Density Ratiomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Composition of the nuclear periphery from antiproton absorption

et al. 1998

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“…It has been known for years that hadronic, in particular kaonic atoms, provide a way to study the extreme tail of the nuclear density distribution, its isospin structure and nuclear correlations there [2]. Two methods have been used [3][4][5][6][7][8][9], each of which gives information in the region roughly 2.0 fm beyond the half density radius.…”

Section: Introductionmentioning

confidence: 99%