1. Reaction cross-sections and reduced strong absorption radii of nuclei in the vicinity of closed shells N = 20 and N = 28.
- Author
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Khouaja, A., Villari, A. C. C., Benjelloun, M., Auger, G., Baiborodin, D., Catford, W., Chartier, M., Demonchy, C. E., Dlouhy, Z., Gillibert, A., Giot, L., Hirata, D., Lépine-Szily, A., Mittig, W., Orr, N., Penionzhkevich, Y., Pitae, S., Roussel-Chomaz, P., Saint-Laurent, M. G., and Savajols, H.
- Subjects
NUCLEAR energy ,NEUTRONS ,PARTICLES (Nuclear physics) ,NUCLEAR physics ,PHYSICS - Abstract
Energy integrated reaction cross-section measurements of around sixty neutron-rich nuclei covering the region of closed shells N = 20 and N = 28 were performed at intermediate energy (30-65 A
. MeV) using direct method. In this experiment, silicon detectors were used as active targets. The reduced strong absorption radii, r0 2 , for 19 new nuclei (27 F,27,30 Ne,33 Na,28, 34-35 Mg,36-38 Al,38-40 Si,41-42 P,42-44 S and45 Cl) are deduced for the first time. An additional 60 radii, also measured in this experiment, are compared to results from literature. A new quadratic parametrization is proposed for the nuclear radius as a function of the isospin in the region of closed shells N = 8 and N = 28. According to this parametrization, the skin effect is well reproduced and anomalous behaviour on the radii are observed in23 N,29 Ne,33 Na,35 Mg,44 S,45 Cl and45 Ar nuclei. [ABSTRACT FROM AUTHOR]- Published
- 2005
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