Nuclear and Coulomb Interaction in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>8</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi>B</mml:mi></mml:math>Breakup at Sub-Coulomb Energies

Guimarães, V.; Kolata, J.J.; Peterson, D.; Santi, Peter A.; White-Stevens, R. H.; Sabourin, Vincent; Becchetti, F. D.; Lee, M. Y.; O’Donnell, T.W.; Roberts, D. A.; Zimmerman, Jeffrey A.

doi:10.1103/physrevlett.84.1862

Cited by 98 publications

(86 citation statements)

References 19 publications

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“…They analyzed data from the 6 He + 208 Pb reaction at 22 MeV [18] and the 8 B + 58 Ni reaction at 26 MeV [38]. The 8 B data were equally-well represented in both schemes, but the 6 He data were in much-better agreement with the TC calculation, indicating that the α-particles emitted at backward angles arise from 2n-transfer to slightly-unbound states of the target.…”

Section: Effect Of Breakup On Elastic Scattering and Fusion Near The mentioning

confidence: 99%

Elastic scattering, fusion, and breakup of light exotic nuclei

2016

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Abstract. The present status of fusion reactions involving light (A < 20) radioactive projectiles at energies around the Coulomb barrier (E < 10 MeV per nucleon) is reviewed, emphasizing measurements made within the last decade. Data on elastic scattering (providing total reaction cross section information) and breakup channels for the involved systems, demonstrating the relationship between these and the fusion channel, are also reviewed. Similarities and differences in the behavior of fusion and total reaction cross section data concerning halo nuclei, weakly-bound but less exotic projectiles, and strongly-bound systems are discussed. One difference in the behavior of fusion excitation functions near the Coulomb barrier seems to emerge between neutron-halo and proton-halo systems. The role of charge has been investigated by comparing the fusion excitation functions, properly scaled, for different neutron-and proton-rich systems. Possible physical explanations for the observed differences are also reviewed.

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Section: Effect Of Breakup On Elastic Scattering and Fusion Near The mentioning

confidence: 99%

Elastic scattering, fusion, and breakup of light exotic nuclei

2016

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“…MeV [10,11]. Detailed CDCC calculations by Tostevin et al [4] reproduced the breakup data for both the angular distributions of the 7 Be fragments and their energy distributions measured at several laboratory angles.…”

Section: The 8 B + 58 Ni Experimentsmentioning

confidence: 82%

“…An angular distribution for 7 Be from bu reactions in 8 B + 58 Ni was reported in Refs. [10,11] for E lab = 25.75 MeV. Single-angle (θ = ± 45 • ) measurements for the additional energies of 25.0, 26.9, and 28.4 MeV have also been reported [15].…”

Section: Absolute Normalization Of Datamentioning

confidence: 99%

Above-barrier fusion enhancement of proton-halo systems

et al. 2016

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Previously reported data for fusion of the 8 B + ( 58 Ni, 28 Si) systems are critically reviewed. New α particle data from the fusion of 8 B + 58 Ni also are reported, but the paper is mostly based on using realistic calculations of well established codes to reanalyze the previous data. The influence of breakup protons on the evaporation proton measurements for the heavier system is found to be small at all energies except for the lowest one measured, and corrections are made for this process. Possible model dependencies in the deduced fusion cross sections are investigated using three different evaporation codes. The data sets for the 58 Ni and 28 Si targets are shown to be consistent with each other and with fusion enhancement up to energies that are greater than the Coulomb barrier V b (E c.m. < ∼ V b + 1.5×hω). This limit corresponds to 6.2 MeV above the barrier for the 58 Ni target. An important difference with the behaviour of neutron-halo systems is thus confirmed.PACS numbers: 25.60. Pj ,

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“…In Ref. [33], an angular distribution for the breakup of 8 B on a 58 Ni target was measured for a near barrier energy. It was found that Coulomb-nuclear interference at very large distances still plays an important role, thus providing evidence for the proton-halo nature of 8 B.…”

Section: Proton-halo Effectsmentioning

confidence: 99%

Recent results in reactions using radioactive ion beams

Aguilera¹,

Kolata²,

Martel³

et al. 2012

Proceedings of XXXIV Edition of the Brazilian Workshop on Nuclear Physics — PoS(XXXIV BWNP)

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After more than two and a half decades of radioactive beam physics, the existence of nuclear halos remains as probably the most outstanding discovery in the field. Many measurements have been performed with light halo systems, especially with a 6 He projectile, which has a two-neutron halo. The total reaction cross sections that can be extracted from these measurements follow a systematic trend that can be compared to the behavior of the respective core, in this case 4 He. By using an appropriate scaling for energies and cross sections, such comparison clearly shows the effects of the halo, which can be separated into static and dynamic effects. For a few systems, where the reactions of the halo have been explicitly measured, application of the same scaling criteria leads to the conclusion of a core-halo decoupling. The behavior of the proton-halo projectile 8 B is similar to that of 6 He insofar as total reaction cross sections are concerned. The measured fusion data for 8 B + 58 Ni, however, show a remarkable size effect of the halo which has no equivalent in the corresponding data for neutron-halo projectiles.

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Nuclear and Coulomb Interaction in8BBreakup at Sub-Coulomb Energies

Cited by 98 publications

References 19 publications

Elastic scattering, fusion, and breakup of light exotic nuclei

Elastic scattering, fusion, and breakup of light exotic nuclei

Above-barrier fusion enhancement of proton-halo systems

Recent results in reactions using radioactive ion beams

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