Comparison of {sup 120}Sn({sup 6}He,{sup 6}He){sup 120}Sn and {sup 120}Sn({alpha},{alpha}){sup 120}Sn elastic scattering and signatures of the {sup 6}He neutron halo in the optical potential

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.044606· OSTI ID:21419616

Mohr, P ^[1]; Faria, P N. de; Lichtenthaeler, R; Pires, K C. C.; Guimaraes, V; Lepine-Szily, A; Mendes, Jr, D R; Barioni, A; Morcelle, V; Morais, M C ^[2]; Arazi, A ^[3]

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1. Strahlentherapie, Diakonie-Klinikum, D-74523 Schwaebisch Hall (Germany)
2. Instituto de Fisica-Universidade de Sao Paulo, C.P. 66318, 05389-970 Sao Paulo (Brazil)
3. Laboratorio Tandar, Departamento de Fisica, Comision Nacional de Energia (Argentina)

Cross sections of {sup 120}Sn({alpha},{alpha}){sup 120}Sn elastic scattering have been extracted from the {alpha}-particle-beam contamination of a recent {sup 120}Sn({sup 6}He,{sup 6}He){sup 120}Sn experiment. Both reactions are analyzed using systematic double-folding potentials in the real part and smoothly varying Woods-Saxon potentials in the imaginary part. The potential extracted from the {sup 120}Sn({sup 6}He,{sup 6}He){sup 120}Sn data may be used as the basis for the construction of a simple global {sup 6}He optical potential. The comparison of the {sup 6}He and {alpha} data shows that the halo nature of the {sup 6}He nucleus leads to a clear signature in the reflexion coefficients {eta}{sub L}: The relevant angular momenta L with {eta}{sub L}>>0 and {eta}{sub L}<<1 are shifted to larger L with a broader distribution. This signature is not present in the {alpha}-scattering data and can thus be used as a new criterion for the definition of a halo nucleus.

• OSTI ID: 21419616
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevC.82.044606; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
ALPHA PARTICLES
ALPHA REACTIONS
ANGULAR MOMENTUM
BASES
BEAMS
COMPARATIVE EVALUATIONS
CONSTRUCTION
CONTAMINATION
CROSS SECTIONS
DISTRIBUTION
ELASTIC SCATTERING
HELIUM 6
LEAD
NUCLEAR HALOS
OPTICAL MODELS
REFLECTION
TIN 120
TIN 120 TARGET
WOODS-SAXON POTENTIAL
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DECAY
ELEMENTS
EVALUATION
EVEN-EVEN NUCLEI
HELIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
METALS
MILLISECONDS LIVING RADIOISOTOPES
NUCLEAR DECAY
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
NUCLEI
POTENTIALS
RADIATIONS
RADIOISOTOPES
SCATTERING
STABLE ISOTOPES
TARGETS
TIN ISOTOPES