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Rusek, K.; Clarke, N.M.; Ward, R. P.

doi:10.1103/physrevc.50.2010

Cited by 16 publications

(37 citation statements)

References 24 publications

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“…Elastic scattering angular distributions for the 20 Ne + 208 Pb system have been measured for incident 20 [3]. The 161.2 MeV data at first sight appear to show the usual Fresnel scattering pattern and an acceptable description of these data could be obtained with standard optical potentials, with the exception of the angular region between 34…”

Section: Systems With Effects Due To Projectile Couplingmentioning

confidence: 94%

“…In spite of a large cross section for mutual excitation of the 20 Ne and 148 Nd 2 + 1 states it was found that coupling to mutual excitation had little influence on the elastic scattering angular distribution [16]. The effect seems to be due to the individual couplings to the separate 2…”

Section: Systems With Effects Due To Projectile and Target Couplingmentioning

confidence: 95%

“…As an example of a system with strong coupling in both projectile and target we cite 20 Ne + 148 Nd. Data for the elastic and inelastic scattering in this system were measured using a QDDD magnetic spectrometer at an incident energy of 116 MeV [16].…”

Section: Systems With Effects Due To Projectile and Target Couplingmentioning

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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Section: Systems With Effects Due To Projectile Couplingmentioning

confidence: 94%

Section: Systems With Effects Due To Projectile and Target Couplingmentioning

confidence: 95%

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

2014

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“…These were chosen so as to reproduce the empirical value of the reduced transition probability B(E2;3/2~1/2 ) [25].The wave function of the 7/2 second excited state was calculated using a weak binding energy approximation [26], in which a very small binding energy is assumed for this state. The 5/2 third excited state was treated as an energy bin of 5 MeV width.…”

Section: Calculationsmentioning

confidence: 99%

Tensor analyzing powers forLi7breakup

Davis

Shepherd-Themistocleous

Shotter

et al. 1995

Phys. Rev. C

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“…Especially, in the case of 6Li scattering and breakup, such irritating featuresthe dependencies on the theoretical input-(see also the analyses of 60-Me V 6Li scattering [5])-have become conspicuous. Nevertheless, 6Li appears tobe a good testing ground to look for continuum coupling effects.…”

Section: Introductionmentioning

confidence: 99%

STUDIES OF CONTINUUM COUPLING EFFECTS IN ⁶Li (α, α′) AND ⁶Li (p, p′) EXCITATION

Kanungo¹,

Lahiri²,

Samanta³

et al. 1995

Int. J. Mod. Phys. E

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The nonresonant continuum part of 6Li:::::}a+d breakup at low relative fragment energies, induced by 50-MeV a-particle and 65-MeV proton scattering, is discretized in two separate energy bins. Realistic coupled-channel analyses are carried out, coupling the 1 + ground state with both the resonant 3t + state as well as the two nonresonant discretized continuum states, including selfcoupling. A simultaneaus fit to the data puts stringent constraints on the coupling strengths. It delineates that their arbitrary variation is unacceptable and that the complex coupling schemes in CDCC calculations need sufficient experimental control. The coupling effects by multistep processes (virtual excitations) through intermediate continuum states prove tobe marginal in the considered 6Li (a, a ') 6Li* and 6Li (p, p ') 6Li* cases.

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Cluster-folding analysis of→6+26

Cited by 16 publications

References 24 publications

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

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

Tensor analyzing powers forLi7breakup

STUDIES OF CONTINUUM COUPLING EFFECTS IN ⁶Li (α, α′) AND ⁶Li (p, p′) EXCITATION

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Cluster-folding analysis of→6+26

Cited by 16 publications

References 24 publications

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

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

Tensor analyzing powers forLi7breakup

STUDIES OF CONTINUUM COUPLING EFFECTS IN 6Li (α, α′) AND 6Li (p, p′) EXCITATION

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STUDIES OF CONTINUUM COUPLING EFFECTS IN ⁶Li (α, α′) AND ⁶Li (p, p′) EXCITATION