Interaction cross sections and matter radii of A = 20 isobars
Identifieur interne : 000D71 ( Main/Exploration ); précédent : 000D70; suivant : 000D72Interaction cross sections and matter radii of A = 20 isobars
Auteurs : L. Chulkov [Russie] ; G. Kraus [Allemagne] ; O. Bochkarev [Russie] ; P. Egelhof [Allemagne] ; H. Geissel [Allemagne] ; M. Golovkov [Russie] ; H. Irnich [Allemagne] ; Z. Janas [Allemagne] ; H. Keller [Allemagne] ; T. Kobayashi [Japon] ; G. Münzenberg [Allemagne] ; F. Nickel [Allemagne] ; A. Ogloblin [Russie] ; A. Ozawa [Japon] ; S. Patra [Inde] ; A. Piechaczek [Allemagne] ; E. Roeckl [Allemagne] ; W. Schwab [Allemagne] ; K. Sümmerer [Allemagne] ; T. Suzuki [Japon] ; I. Tanihata [Japon] ; K. Yoshida [Japon]Source :
- Nuclear Physics, Section A [ 0375-9474 ] ; 1995.
Abstract
High-energy interaction cross sections of A = 20 nuclei (20N, 20O, 20F, 20Ne, 20Na, 20Mg) on carbon were measured with accuracies of ≈ 1%. The nuclear matter r.m.s. radii derived from the measured cross sections show an irregular dependence on isospin projection. The largest difference in radii, which amounts to approximately 0.2 fm, has been obtained for the mirror nuclei 20O and 20Mg. The influence of nuclear deformation and binding energy on the radii is discussed. By evaluating the difference in r.m.s. radii of neutron and proton distributions, evidence has been found for the existence of a proton skin for 20Mg and of a neutron skin for 20N.
Url:
DOI: 10.1016/0375-9474(96)00160-1
Affiliations:
- Allemagne, Inde, Japon, Russie
- District de Darmstadt, District fédéral central, Hesse (Land)
- Darmstadt, Moscou
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<front><div type="abstract" xml:lang="en">High-energy interaction cross sections of A = 20 nuclei (20N, 20O, 20F, 20Ne, 20Na, 20Mg) on carbon were measured with accuracies of ≈ 1%. The nuclear matter r.m.s. radii derived from the measured cross sections show an irregular dependence on isospin projection. The largest difference in radii, which amounts to approximately 0.2 fm, has been obtained for the mirror nuclei 20O and 20Mg. The influence of nuclear deformation and binding energy on the radii is discussed. By evaluating the difference in r.m.s. radii of neutron and proton distributions, evidence has been found for the existence of a proton skin for 20Mg and of a neutron skin for 20N.</div>
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