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Stokstad, R. G.; Gross, E.E.

doi:10.1103/physrevc.23.281

Cited by 117 publications

(52 citation statements)

References 46 publications

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“…Angular distributions for the elastic scattering of 72 MeV 16 O ions from 152 Sm [6,7] and, to a lesser extent from 148 Sm [7] show similar behaviour, see fig. 4.…”

Section: Systems With Effects Due To Target Couplingmentioning

confidence: 57%

“…Data were also obtained at lower energies for the 16 O + 148,150,152 Sm systems by Talon et al [8]. These data too show significant deviations from Rutherford scattering but the effect on the shape of the angular distribution is not so dramatic as for the higher- [6,7] but the lower-energy measurements of Talon et al [8] employed a QDDD magnetic spectrometer. Figure 4 provides an unambiguous demonstration of the link between the importance of the coupling effect and the strength of the B(E2) and the excitation energy of the 2 + 1 state since the charge products and, to a very good approximation, the Coulomb barriers are identical for the 16 [9] which show a classic Fresnel scattering angular distribution, 144 Sm being a weakly coupled spherical nucleus with a relatively highlying first excited state.…”

Section: Systems With Effects Due To Target Couplingmentioning

confidence: 82%

“…15. While the model of 8 B employed in these calculations is simplified to the extent that excitations of the 7 Be core are ignored, the 170.3 MeV 8 B + Nat Pb elastic scattering data of Yang et al [42] suggest that it is sufficiently realistic. Coupling effects are expected to be minimal at this energy -approximately three times the Coulomb barrier-and indeed the measured angular distribution shows a classic Fresnel scattering pattern [42].…”

Section: Strong Coupling Effects With Radioactive Beamsmentioning

confidence: 99%

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Strong coupling effects in near-barrier heavy-ion elastic scattering

2014

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Abstract. Accurate elastic scattering angular distribution data measured at bombarding energies just above the Coulomb barrier have shapes that can markedly differ from or be the same as the expected classical Fresnel scattering pattern depending on the structure of the projectile, the target or both. Examples are given such as 18 O + 184 W and 16 O + 148,152 Sm, where the expected rise above Rutherford scattering due to Coulomb-nuclear interference is damped by coupling to the target excited states, and the extreme case of 11 Li scattering, where coupling to the 9 Li + n + n continuum leads to an elastic scattering shape that cannot be reproduced by any standard optical model parameter set. An early indication that the projectile structure can modify the elastic scattering angular distribution was the large vector analyzing powers observed in polarised 6 Li scattering. The recent availability of high-quality 6 He, 11 Li and 11 Be data provides further examples of the influence that coupling effects can have on elastic scattering. Conditions for strong projectile-target coupling effects are presented with special emphasis on the importance of the beam-target charge combination being large enough to bring about the strong coupling effects. Several measurements are proposed that can lead to further understanding of strong coupling effects by both inelastic excitation and nucleon transfer on near-barrier elastic scattering. A final note on the anomalous nature of 8 B elastic scattering is presented as it possesses a more or less normal Fresnel scattering shape whereas one would a priori not expect this due to the very low breakup threshold of 8 B. The special nature of 11 Li is presented as it is predicted that no matter how far above the Coulomb barrier the elastic scattering is measured, its shape will not appear as Fresnel like whereas the elastic scattering of all other loosely bound nuclei studied to date should eventually do so as the incident energy is increased, making both 8 B and 11 Li truly "exotic".

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“…Angular distributions for the elastic scattering of 72 MeV 16 O ions from 152 Sm [6,7] and, to a lesser extent from 148 Sm [7] show similar behaviour, see fig. 4.…”

Section: Systems With Effects Due To Target Couplingmentioning

confidence: 57%

Section: Systems With Effects Due To Target Couplingmentioning

confidence: 82%

Section: Strong Coupling Effects With Radioactive Beamsmentioning

confidence: 99%

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Strong coupling effects in near-barrier heavy-ion elastic scattering

2014

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“…For example, target and projectile deformation effects have been established in fusion reactions [1]. Near the Coulomb barrier, the fusion cross section for a deformed target nucleus was found to be considerably larger than for a similar spherical nucleus.…”

Section: Introductionmentioning

confidence: 98%

U + U potential in the sudden and adiabatic approximation

Faessler

Ismail

Ohtsuka

et al. 1987

Z. Physik A - Atomic Nuclei

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Dedicated to Professor Theo Mayer-Kuckuk on the occasion of his 60th birthday A recent approach for calculating both the real and imaginary parts of the ion-ion potential has been modified to produce the ground state properties of separate nuclei. This approach is used to study both the energy and orientation dependence of the optical potential between two U nuclei adopting the sudden and adiabatic approximations.

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“…This has been done for 0 (Ref. 77,78) at the Weiimann Institute and for Ar projectiles at GSI. The results exhibit the effect nf nuclear deformat ion on fus ion, but a quant it at i vc analys i s shows the current theoretical methods for describing the reaction mechanism .i re not cnt i re I y adequate , and, furthermore , suggest s that other degrees of freedom (e.g.…”

Section: P 2 Compound Nucleus Modelsmentioning

confidence: 99%

Nuclear structure and heavy-ion fusion. [Lecture]

Stokstad¹

1980

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Analysis of the sub-barrier fusion ofO16+Sm

Cited by 117 publications

References 46 publications

Strong coupling effects in near-barrier heavy-ion elastic scattering

Strong coupling effects in near-barrier heavy-ion elastic scattering

U + U potential in the sudden and adiabatic approximation

Nuclear structure and heavy-ion fusion. [Lecture]

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