Repulsive nature of optical potentials for high-energy heavy-ion scattering

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

DOI:https://doi.org/10.1103/PHYSREVC.82.044612· OSTI ID:21419622

Furumoto, T; Sakuragi, Y; Yamamoto, Y ^[1]

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1. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan) and RIKEN Nishina Center, Wako, Saitama 351-0198 (Japan)

The recent works by the present authors predicted that the real part of heavy-ion optical potentials changes its character from attraction to repulsion around the incident energy per nucleon E/A=200-300 MeV on the basis of the complex G-matrix interaction and the double-folding model (DFM) and revealed that the three-body force plays an important role there. In the present paper, we have precisely analyzed the energy dependence of the calculated DFM potentials and its relation to the elastic-scattering angular distributions in detail in the case of the {sup 12}C+{sup 12}C system in the energy range of E/A=100-400 MeV. The tensor force contributes substantially to the energy dependence of the real part of the DFM potentials and plays an important role to lower the attractive-to-repulsive transition energy. The nearside and farside (N/F) decompositions of the elastic-scattering amplitudes clarify the close relation between the attractive-to-repulsive transition of the potentials and the characteristic evolution of the calculated angular distributions with the increase of the incident energy. Based on the present analysis, we propose experimental measurements for the predicted strong diffraction phenomena of the elastic-scattering angular distribution caused by the N/F interference around the attractive-to-repulsive transition energy together with the reduced diffractions below and above the transition energy.

• OSTI ID: 21419622
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevC.82.044612; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
ANGULAR DISTRIBUTION
CARBON 12
DECOMPOSITION
DIFFRACTION
ELASTIC SCATTERING
ENERGY DEPENDENCE
FOLDING MODEL
G MATRIX
HEAVY IONS
INTERACTIONS
INTERFERENCE
MEV RANGE 100-1000
NUCLEONS
OPTICAL MODELS
THREE-BODY PROBLEM
BARYONS
CARBON ISOTOPES
CHARGED PARTICLES
CHEMICAL REACTIONS
COHERENT SCATTERING
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
IONS
ISOTOPES
LIGHT NUCLEI
MANY-BODY PROBLEM
MATHEMATICAL MODELS
MATRICES
MEV RANGE
NUCLEAR MODELS
NUCLEI
SCATTERING
STABLE ISOTOPES