Evidence for a nuclear halo from [sup 11]Li elastic scattering measured at 637 MeV incident energy on a [sup 12]C target

Journal Article · Sat May 01 04:00:00 EDT 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.2213· OSTI ID:6610695

Mermaz, M C ^[1]

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1. Service de Physique Nucleaire, Centre d'Etudes de Saclay, 91191 Gif sur Yvette CEDEX (France)

An optical model analysis of the elastic scattering of [sup 11]C and [sup 11]Li on [sup 12]C target nuclei has been performed, for measurements at 620 and 637 MeV laboratory incident energy, respectively. The data are from the group of the University of Notre Dame. It has turned out, in the case of the [sup 11]Li projectile, that it was necessary to use a real and imaginary surface potential peaked very far outside of the nucleus core, in order to reproduce the elastic scattering angular distribution at very forward angles. The extracted optical model reaction cross section leads to a radius of 3.7 fm for [sup 11]Li in agreement with what is already known in the literature from interaction cross section measurements. On the contrary, the extracted radius for the [sup 11]C nucleus is 2.5 fm in this experiment. Furthermore, at this high incident energy, a strong far-side component on [sup 11]Li is evidenced by a Fuller analysis. This large radius for the [sup 11]Li nucleus, added to the fact that strong refractive effects are observed in the elastic scattering, is a clear signature of a nuclear halo for the [sup 11]Li nucleus.

• OSTI ID: 6610695
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:5; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663300 -- Nuclear Reactions & Scattering
General-- (1992-)
663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663520 -- Nuclear Mass Ranges-- A=6-19-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CARBON 12 REACTIONS
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
ELASTIC SCATTERING
ENERGY RANGE
HEAVY ION REACTIONS
INTEGRAL CROSS SECTIONS
LITHIUM 11 REACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR PROPERTIES
NUCLEAR RADII
NUCLEAR REACTIONS
OPTICAL MODELS
SCATTERING
TARGETS