Model-unrestricted nucleus-nucleus scattering potentials from measurement and analysis of scattering

Bartnitzky, G.; Blažević, A.; Bohlen, H. G.; Casandjian, J. M.; Chartier, M.; Clement, H.; Gebauer, B.; Gillibert, A.; Kirchner, Th.; Khoa, Dao T.; Lépine‐Szily, A.; Mittig, W.; Oertzen, W. von; Ostrowski, A. N.; Roussel‐Chomaz, P.; Siegler, John; Wilpert, M.; Wilpert, Th.

doi:10.1016/0370-2693(95)01292-3

Cited by 45 publications

(119 citation statements)

References 15 publications

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“…It can be seen that the Fraunhofer diffraction pattern observed at small angles is due to an interference between the nearside and farside amplitudes in forward direction. At large angles, the elastic scattering pattern is determined dominantly by the farside amplitude, and the Airy oscillation pattern can be well observed when the absorption is weak (like that found for the 16 O+ 16 O system). In such a case, if one can measure accurately the scattering cross section down to dσ/dσ R ≈ 10 −5 , very valuable information on the real nucleusnucleus OP is obtained.…”

Section: The Farside Scattering and The Airy Oscillation Patternmentioning

confidence: 90%

“…This distance is significantly smaller than the strong absorption radius R sa ≈ 7 − 8 fm as given by the global systematics (4) from Ref. [5], and the measured elastic 16 O+ 16 O data [14] at this energy also have one of the most pronounced rainbow pattern ever observed in HI elastic scattering. The elastic 16 O+ 16 O data at 350 MeV and those at lower energies show consistently a well defined Airy pattern which is very helpful in reducing the ambiguity of the shape and depth of the OP [23,24].…”

Section: Incomplete Absorption and The Rise Of The Nuclear Rainbowmentioning

confidence: 94%

“…Therefore, the nuclear rainbow should be strongest in the elastic scattering channel if a system with small absorption is chosen. Indeed, the nuclear rainbow pattern has been first observed during the 70's of the last century in the elastic α-nucleus scattering [8,9,10], and later on in the elastic scattering measured for some strongly bound light heavyion systems like 12 C+ 12 C [11,12,13] or 16 O+ 16 O [14,15,16]. For these systems the absorption due to nuclear reactions was sufficiently low for the rainbow effect to appear.…”

Section: Nuclear Rainbowmentioning

confidence: 99%

“…At lower energies the secondary Airy maximum was also observed. The rainbow angle Θ R found for the elastic 16 O+ 16 O scattering, at energies of 250 to 1120 MeV, is located near the maximum of the light intensity in the atmospheric rainbow. Illustration taken from Ref.…”

Section: Nuclear Rainbowmentioning

confidence: 99%

“…As an example, the nearside/farside decomposition of the elastic 16 O+ 16 O scattering amplitude (using Fuller's method [26]) is shown in Fig. 10.…”

Section: The Farside Scattering and The Airy Oscillation Patternmentioning

confidence: 99%

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Nuclear rainbow scattering and nucleus–nucleus potential

Khoa

Oertzen

Bohlen

et al. 2007

J. Phys. G: Nucl. Part. Phys.

196

308

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Abstract. Elastic scattering of α-particle and some tightly-bound light nuclei has shown the pattern of rainbow scattering at medium energies, which is due to the refraction of the incident wave by a strongly attractive nucleus-nucleus potential. This review gives an introduction to the physics of the nuclear rainbow based essentially on the optical model description of the elastic scattering. Since the realistic nucleusnucleus optical potential (OP) is the key to explore this interesting process, an overview of the main methods used to determine the nucleus-nucleus OP is presented. Given the fact that the absorption in a rainbow system is much weaker than that usually observed in elastic heavy-ion scattering, the observed rainbow patterns were shown to be linked directly to the density overlap of the two nuclei penetrating each other in the elastic channel, with a total density reaching up to twice the nuclear matter saturation density ρ 0 . For the calculation of the nucleus-nucleus OP in the doublefolding model, a realistic density dependence has been introduced into the effective M3Y interaction which is based originally on the G-matrix elements of the Reid-and Paris nucleon-nucleon (NN) potentials. Most of the elastic rainbow scattering data were found to be best described by a deep real OP like the folded potential given by this density dependent M3Y interaction. Within the Hartree-Fock formalism, the same NN interaction gives consistently a soft equation of state of cold nuclear matter which has an incompressibility constant K ≈ 230 − 260 MeV. Our folding analysis of numerous rainbow systems has shown that the elastic α-nucleus and nucleus-nucleus refractive rainbow scattering is indeed a very helpful experiment for the determination of the realistic K value. The refractive rainbow-like structures observed in other quasielastic scattering reactions have also been discussed. Some evidences for the refractive effect in the elastic scattering of unstable nuclei are presented and perspectives for the future studies are discussed.

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Section: The Farside Scattering and The Airy Oscillation Patternmentioning

confidence: 90%

Section: Incomplete Absorption and The Rise Of The Nuclear Rainbowmentioning

confidence: 94%

Section: Nuclear Rainbowmentioning

confidence: 99%

Section: Nuclear Rainbowmentioning

confidence: 99%

“…As an example, the nearside/farside decomposition of the elastic 16 O+ 16 O scattering amplitude (using Fuller's method [26]) is shown in Fig. 10.…”

Section: The Farside Scattering and The Airy Oscillation Patternmentioning

confidence: 99%

See 3 more Smart Citations

Nuclear rainbow scattering and nucleus–nucleus potential

Khoa

Oertzen

Bohlen

et al. 2007

J. Phys. G: Nucl. Part. Phys.

196

308

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The equation of state for cold nuclear matter as seen in nucleus-nucleus scattering

et al. 1998

Self Cite

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The equation of state for cold nuclear matter is determined by the effective, density-dependent interaction between bound nucleons at temperature T = 0 . This interaction can be probed in elastic nucleus-nucleus collisions at various density overlaps which may extend to several times the normal matter density. For this purpose the elastic scattering of 16 O ions on 16 O has been measured at incident energies from 250 to 1120 MeV with high accuracy. From these data, which sample both diffractive and refractive scattering processes, we extract the underlying scattering potentials utilizing model-unrestricted analysis methods. These potentials fit very well into the systematics found in light-ion scattering and compare very favorably with microscopic calculations, if these are based on a weak density dependence of the effective NN interaction, resulting in a soft equation of state for cold nuclear matter.PACS 21.30 -Nuclear forces. PACS 21.65 -Nuclear matter. PACS 25.70.Bc -Elastic and quasielastic scattering. PACS 01.30.Cc -Conference proceedings.

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Optical model potentials for 16O + 16O elastic scattering

Hamada

Ibraheem

2019

Indian J Phys

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Model-unrestricted nucleus-nucleus scattering potentials from measurement and analysis of scattering

Cited by 45 publications

References 15 publications

Nuclear rainbow scattering and nucleus–nucleus potential

Nuclear rainbow scattering and nucleus–nucleus potential

The equation of state for cold nuclear matter as seen in nucleus-nucleus scattering

Optical model potentials for 16O + 16O elastic scattering

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