Barrier distributions from elastic scattering

Rowley, N.; Timmers, H.; Leigh, J.R.; Dasgupta, M.; Hinde, David; Mein, J. C.; Morton, Clyde; Newton, J.O.

doi:10.1016/0370-2693(96)00118-9

Cited by 44 publications

(44 citation statements)

References 20 publications

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“…They found that although this representation of the quasi-elastic scattering data indeed shows the general features of the fusion barrier distributions, its sensitivity is reduced at high energies. More recently Rowley et al (1996) showed that the effects of strong coupling are present in the barrier distributions from the elastic scattering, but are smoothed out since different eigen-barriers have phase differences. Furthermore the effects are also smoothed by weak couplings, which appear in first order in the elastic scattering cross section, but only in second order in fusion cross section.…”

Section: H Difficulties In Extracting Barrier Distributionsmentioning

confidence: 99%

Quantum tunneling in nuclear fusion

1998

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Recent theoretical advances in the study of heavy ion fusion reactions below the Coulomb barrier are reviewed. Particular emphasis is given to new ways of analyzing data, such as studying barrier distributions; new approaches to channel coupling, such as the path integral and Green function formalisms; and alternative methods to describe nuclear structure effects, such as those using the Interacting Boson Model. The roles of nucleon transfer, asymmetry effects, higher-order couplings, and shape-phase transitions are elucidated. The current status of the fusion of unstable nuclei and very massive systems are briefly discussed.

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Section: H Difficulties In Extracting Barrier Distributionsmentioning

confidence: 99%

Quantum tunneling in nuclear fusion

1998

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“…For further understanding this subject and being able to energy map the potential, other complementary means to the conventional techniques should be also adopted. As such, the application of elastic backscattering [7] was recently suggested in [8,9], while its role for probing properties of the optical potential and the structure of the involved nuclei has been extensively demonstrated in recent years [10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…The elastic backscattering, as a tool for probing the energy dependence of the potential at near-and sub-barrier energies, was first applied to the weakly bound nuclei 6 Li and 7 Li scattered by the light target 28 Si [8,9]. Previous inconsistencies [18,19] with regard to the new potential anomaly, observed in this system, were clarified.…”

Section: Introductionmentioning

confidence: 99%

“…Other measurements of elastic and quasi-elastic backscattering barrier distributions for weakly bound nuclei have been reported previously for heavy targets: 6,7 Li + 208 Pb [20], 6 Li + 144,146 Sm [21,22] and 6 Li + 232 Th [23] with the emphasis on the coupling effects rather than the energy dependence of the optical potential. The choice of almost spherical targets in the present case was based mainly on our intention to probe the potential without any strong interference from the structure of the involved nuclei.…”

Section: Introductionmentioning

confidence: 99%

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Quasi-elastic backscattering of 6,7Li on light, medium and heavy targets at near- and sub-barrier energies

et al. 2012

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Abstract.We have performed precision elastic backscattering measurements for the weakly bound nuclei 6,7 Li on the medium and heavy mass targets 58 Ni, 116,120 Sn and 208 Pb at sub-and near-barrier energies (E c.m./Vbar = 0.6 to 1.3). Excitation functions of elastic scattering cross-sections have been measured at ±160• and ±170• and the corresponding ratios to Rutherford scattering and relevant barrier distributions have been extracted. These measurements complement recent work on a 28 Si target, for probing systematically the potential at sub-and near-barrier energies and relevant reaction mechanisms, while indicate a possible breakdown of the dispersion relation.

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“…Moreover, from the experimental point of view, the detection method is simpler for the quasi-elastic particles at backward angles close to 180 than that for the fusion residual at forward angles close to beam direction. Therefore, the backward quasi-elastic measurements were employed in experiment to probe the surface diffuseness parameter [11][12][13][14][15], the barrier distribution [16][17][18][19][20], etc., in the past years.…”

Section: Introductionmentioning

confidence: 99%

Nuclear reactions studied by quasi-elastic measurements with high precision at backward angles

Lin

Jia

Zhang

et al. 2011

EPJ Web of Conferences

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Abstract. The excitation functions of quasi-elastic scatterings at backward angles were measured with high precision to study the mechanisms of heavy-ion reactions at near-and sub-barrier energies. The surface diffuseness parameters for the 16 O+ 144,152,154 Sm, 170 Er, 174 Yb, 184,186 W, 194,196 Pt, and 208 Pb systems have been extracted by the single-channel and coupled-channels calculations, respectively. No anomaly was found in these quasi-elastic processes. The barrier heights and barrier distributions were systematically investigated for these systems. Moreover, the coupled-channels effects of neutron transfers with positive Q-value and the breakup effects of weakly-bound nuclei on the fusion processes were also studied for the 32 S+ 90,96 Zr systems and the 6,7 Li, 9 Be+ 208 Pb systems, respectively.

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Barrier distributions from elastic scattering

Cited by 44 publications

References 20 publications

Quantum tunneling in nuclear fusion

Quantum tunneling in nuclear fusion

Quasi-elastic backscattering of 6,7Li on light, medium and heavy targets at near- and sub-barrier energies

Nuclear reactions studied by quasi-elastic measurements with high precision at backward angles

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