Airy minimum crossing θcm = 90° at Elab = 124 MeV for the system

Kondō, Y.; Sugiyama, Y.; Tomita, Takuro; Yamanouchi, Y.; Ikezoe, H.; Ideno, K.; Hamada, S.; Sugimitsu, T.; Hijiya, M.; Fujita, Hiroharu

doi:10.1016/0370-2693(95)01305-9

Cited by 41 publications

(27 citation statements)

References 21 publications

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“…[24]). In addition, the elastic 16 O+ 16 O data at E lab = 124 and 145 MeV have been measured by Sugiyama et al at JAERI (Tokai) [29,30]. The JAERI data were used to investigate the evolution of the Airy interference pattern in the excitation function at lower energies [30].…”

Section: 1mentioning

confidence: 99%

“…Decomposition of the unsymmetrized 16 O+ 16 O elastic scattering cross section (thick solid curves) at E lab = 124 and 145 MeV into the nearside (dotted curves) and farside (solid curves) components using Fuller's method [26]. The WoodsSaxon squared (WS2) potentials, which give the best fit to the data measured at these energies by Sugiyama et al [29,30], have been used in the OM calculation. Ak indicates the k-th order of the Airy minimum in the farside cross section.…”

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.

203

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: 1mentioning

confidence: 99%

Section: The Farside Scattering and The Airy Oscillation Patternmentioning

confidence: 99%

Nuclear rainbow scattering and nucleus–nucleus potential

Khoa

Oertzen

Bohlen

et al. 2007

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

203

308

View full text Add to dashboard Cite

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“…For example, the 90°excitation functions display gross structure, and/or the angular distributions show a series of broad humps separated by deep minima; at sufficiently high incident energy the differential cross sections decrease exponentially at large angles [2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Airy structure in inelastic light-ion and light heavy-ion scattering

Michel

Ohkubo

2004

Phys. Rev. C

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We suggest that the transparency displayed by some light heavy-ion systems, such as 16 O+ 16 O, 16 O+ 12 C, or 12 C+ 12 C, which manifests itself by the emergence of Airy structure in the elastic scattering angular distributions and excitation functions, could also have observable consequences in some inelastic channels. Indeed benchmark calculations for the ␣ + 40 Ca light-ion system, where a similar mechanism dominates elastic scattering at low energy, reveals the persistence in inelastic scattering of the interference mechanism between the barrier-wave and internal-wave components of the scattering amplitude which underlies the Airy structure in the elastic channel. These calculations seem to point to new phase rules between the elastic and inelastic angular distributions.

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“…This is important for a folding model based on the complex G-matrix, because the imaginary part of the G-matrix is expected to simulate the effect of single-particle-like excitations of finite nuclear systems through NN pair-scattering correlations and the effect of coherent, collective excitations of a finite nucleus may not be included in the imaginary part of the G-matrix. Therefore, the 16 O + 16 O system is one of the ideal benchmark systems to test the validity of interaction models; in fact, a number of interaction models, either purely phenomenological [30][31][32] or microscopic in various senses [12,13,22,23], have been tested for decades on this system as a milestone to be cleared.…”

Section: O + 16 O Elastic Scatteringmentioning

confidence: 99%

Important role of three-body repulsive force effect in nuclear reactions

Furumoto

Sakuragi

Yamamoto

2010

EPJ Web of Conferences

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Abstract. The effect of three-body force (TBF) is studied in nucleus-nucleus elastic scattering on the basis of Brueckner theory for nucleon-nucleon (NN) effective interaction (complex G matrix) in the nuclear matter. A new G matrix called CEG07 proposed recently by the present authors includes the TBF effect and reproduces a realistic saturation curve in the nuclear matter, and is shown to well reproduce proton-nucleus elastic scattering. The microscopic optical potential for nucleus-nucleus system is obtained by folding the G matrix with nucleon density distributions in colliding nuclei. We first analyze the 16 O + 16 O elastic scattering at E/A = 70 MeV in detail. The observed cross sections are nicely reproduced up to the most backward scattering angles only when the TBF effect is included. The effects of the three-body attraction (TBA) and three-body repulsion (TBR) are also analyzed. The TBR contribution has an important role in nucleus-nucleus elastic scattering. The CEG07 G matrix is also tested in the elastic scattering of 16 O by the 12 C, 28 Si and 40 Ca targets at E/A = 93.9 MeV, and in the elastic scattering of 12 C by the 12 C target at E/A = 135 MeV with a great success. The decisive effect of the TBF is clearly seen also in those systems.

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Airy minimum crossing θcm = 90° at Elab = 124 MeV for the system

Cited by 41 publications

References 21 publications

Nuclear rainbow scattering and nucleus–nucleus potential

Nuclear rainbow scattering and nucleus–nucleus potential

Airy structure in inelastic light-ion and light heavy-ion scattering

Important role of three-body repulsive force effect in nuclear reactions

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