Transition between Light- and Heavy-Ion Elastic Scattering

DeVries, R.M.; Goldberg, D.A.; Watson, J. W.; Zisman, Michael S.; Cramer, J. G.

doi:10.1103/physrevlett.39.450

Cited by 101 publications

(37 citation statements)

References 11 publications

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“…At higher bombarding energies and light target nuclei nuclear rainbow scattering has been observed, a feature, which is experimentally established for 6 Li scattering from 12 c 1 ) and 28 si 2 ) and has been found to lead to an increased sensitivity to the shape of the interaction potential. Current microscopic interpretations of the scattering of complex nuclear particles generate the optical potential, in particular its real part, by folding a realistic effective G-matrix interaction with the projectile and target density distributions.…”

Section: Introductionmentioning

confidence: 64%

The optical potential for 6Li-6Li elastic scattering at 156 MeV

Micek

Majka

Rebel³

et al. 1985

Nuclear Physics A

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Section: Introductionmentioning

confidence: 64%

The optical potential for 6Li-6Li elastic scattering at 156 MeV

Micek

Majka

Rebel³

et al. 1985

Nuclear Physics A

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“…Results of the DWBA calculation for the ø17o15 one-neutron transfer reaction to the 15 O 1/2 − ground state at E lab = 250 → 1120 MeV in comparison with the data [108]. The dashed curves were obtained with the same complex OP for the 17 [108] patterns (which have no counterparts in the optical rainbow) should be less pronounced and harder to observe experimentally. The rainbow effects have been investigated, e.g., in the inelastic scattering and one-neutron transfer reactions measured with 12,13 C+ 12 C systems at the energy of 20 MeV/nucleon [13].…”

Section: Rainbow Features In Other Quasi-elastic Scattering Channelsmentioning

confidence: 94%

“…6). They have found that a strong and broad maximum of the elastic cross section at large scattering angles is of refractive nature, and thus can be identified as a nuclear rainbow [17]. Moreover, the most significant physics effect established by these first experiments on the nuclear rainbow is that the extension of the elastic scattering data well beyond the rainbow angle Θ R (marked in Fig.…”

Section: Nuclear Rainbowmentioning

confidence: 98%

Nuclear rainbow scattering and nucleus–nucleus potential

Khoa

Oertzen

Bohlen

et al. 2007

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

208

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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“…:rhe points A, Band c are for 80, 120 and 200 MeV 16 0 ions on 28Si (Goldberg and Smith 1974), using the theoretical angular distributions referred to in Section 2 above, while D and E are for 141· 5 and 215 MeV 16 0 ions on 28Si (Satchler et al 1978), using experimental angular distributions; the latter two points are seen to lie a little above the former three points. The points F and G are for 200 (Cutler et al 1977); M for 135 MeV 6Li on 28Si (DeVries et al 1977). Apart from the three low energy points H, I and K nearest the Coulomb barrier, all the points lie close to a straight line whose slope corresponds to a value for d of 0·4 fm, with points away from the line by amounts corresponding to a variation in d of O· 1 fm.…”

Section: Determination Of Surface Diffusenessmentioning

confidence: 90%

Heavy-ion Elastic Collisions and the Nuclear Surface Diffuseness

Mohr¹

1979

Aust. J. Phys.

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Aust. J. Phys., 1979,32, 541-9 Taking the magnitude of the elements of the S matrix and the nuclear phases to be of Woods-Saxon form in the variable I with width parameter LI, we find that the form of the scattering amplitude components f+ (B) and f-(B) is specified by the parameters LI+ and LI-such that LI is closely the geometric mean of LI+ and LI-. Many angular distributions have been analysed into f+ (B) and f- (B) to obtain LI+ and LI-and hence LI, the angular momentum diffuseness, from which the nuclear surface diffuseness is obtained, so reducing an ambiguity in the nuclear potential. The case of light ions incident on heavy ions has also been investigated.

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Transition between Light- and Heavy-Ion Elastic Scattering

Cited by 101 publications

References 11 publications

The optical potential for 6Li-6Li elastic scattering at 156 MeV

The optical potential for 6Li-6Li elastic scattering at 156 MeV

Nuclear rainbow scattering and nucleus–nucleus potential

Heavy-ion Elastic Collisions and the Nuclear Surface Diffuseness

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