Dynamic effects of breakup on fusion reactions of weakly bound nuclei

Canto, L. F.; Gomes, P. R. S.; Lubián, J.; Chamon, L. C.; Crema, Eduardo

doi:10.1016/j.nuclphysa.2009.02.001

Cited by 213 publications

(222 citation statements)

References 51 publications

(135 reference statements)

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“…This contrasts with what has been observed for neutron-halo systems, where total fusion cross sections seem to be suppressed with respect to a standard reference for energies above the barrier [7,8]. This result was unexpected, especially since the total reaction cross sections behave similarly for both neutron-halo and proton-halo systems.…”

Section: B +contrasting

confidence: 76%

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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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Section: B +contrasting

confidence: 76%

“…However, the fact that alpha particles are unlikely to be products of direct processes with 8 B is a very good asset for this technique.…”

Section: Introductionmentioning

confidence: 99%

Above-barrier fusion enhancement of proton-halo systems

et al. 2016

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“…for instance in Refs. [19][20][21]. Here we chose the prescription recommended in [19], where the cross sections are divided by the quantity r 2 pt , with r pt = A 1/3…”

Section: Proton and Fusion Cross Sectionsmentioning

confidence: 99%

Near-barrier fusion and total reaction of a proton-rich projectile:3He+58Ni

et al. 2013

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Evaporation protons from the fusion of the 3 He + 58 Ni system were measured at three energies near but above the Coulomb barrier. The respective elastic scattering angular distribution was also determined for one of these energies. The fusion data, after being properly reduced to eliminate size and charge effects, are compared to the recently-measured fusion excitation function for the proton-halo system 8 B + 58 Ni. As a reference, fusion data for the 16 O + 58 Ni system are also presented. With respect to this reference, the fusion cross sections for the proton-rich systems show an enhancement likely related to static effects. An excitation function for the respective total reaction cross section was extracted from the measured elastic data along with additional data from the literature. Surprisingly, this excitation function follows the trend expected for weakly-bound systems. 25.60.Dz, 25.60.Pj

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“…In recent years, many efforts have been made to understand the effect of breakup of weakly bound nuclei during the fusion reaction in very asymmetric reactions where the capture cross section is equal to the complete fusion cross section [2,[44][45][46][47][48][49][50]. The light radioactive nuclei, especially halo nuclei, such as 6 He, 8 B, 11 Be, and the stable nuclei 6 Li and 9 Be are weakly bounded, hence there is a chance of the breakup in the colliding process.…”

Section: Reactions With Weakly Bound Projectiles At Energies Around Cmentioning

confidence: 99%

“…The light radioactive nuclei, especially halo nuclei, such as 6 He, 8 B, 11 Be, and the stable nuclei 6 Li and 9 Be are weakly bounded, hence there is a chance of the breakup in the colliding process. By performing a comparison of fusion data with theoretical predictions which do not take into account the dynamic breakup plus transfer channel effects, it has been shown [46][47][48]50], that for energies from about 1.1V b to 1.5V b ( V b is the height of the Coulomb barrier) complete fusion in the reactions 6,7 Li+ 208 Pb, 209 Bi and 9 Be+ 89 Y, 124 Sn, 208 Pb, 209 Bi is suppressed by about 30%. However, the 9 Be+ 144 Sm data is out of the systematics, showing a much smaller suppression of about 15%.…”

Section: Reactions With Weakly Bound Projectiles At Energies Around Cmentioning

confidence: 99%

Role of neutron transfer and deformation effect in capture process at sub-barrier energies

Sargsyan¹,

Adamian²,

Antonenko³

et al. 2012

EPJ Web of Conferences

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Abstract. The roles of nuclear deformation and neutron transfer in sub-barrier capture process are studied within the quantum diffusion approach. The change of the deformations of colliding nuclei with neutron exchange can crucially influence the sub-barrier fusion. The sub-barrier capture reactions following the neutron pair transfer are used for the indirect study of neutron-neutron correlation in the surface region of nucleus. The strong surface enhancement of the neutron pairing in nuclei 48 Ca, 64 Ni, and 116,124,132 Sn is demonstrated. Comparing the capture cross sections calculated without the breakup effect and experimental complete fusion cross sections, the breakup was analyzed in reactions with weakly bound projectiles 6,7,9 Li and 9 Be. A trend of a systematic behavior for the complete fusion suppression as a function of the target charge and bombarding energy is not achieved.

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Dynamic effects of breakup on fusion reactions of weakly bound nuclei

Cited by 213 publications

References 51 publications

Above-barrier fusion enhancement of proton-halo systems

Above-barrier fusion enhancement of proton-halo systems

Near-barrier fusion and total reaction of a proton-rich projectile:3He+58Ni

Role of neutron transfer and deformation effect in capture process at sub-barrier energies

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