Systematic study of elastic scattering and fusion induced by weakly bound 6Li on medium mass targets. Threshold anomalies

Torabi, F.; Aguilera, E. F.; Ghodsi, O. N.; Gómez-Camacho, A.

doi:10.1016/j.nuclphysa.2019.121661

Cited by 10 publications

(8 citation statements)

References 57 publications

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“…Of course, if all relevant channels are included in the CC calculations, the renormalized experimental fusion function is expected to coincide with the UFF. The fusion function method has been widely used in comparative studies of fusion cross sections in collisions of weakly-bound and tightly-bound projectiles [155,232,233,234,235,236,237,238].…”

Section: Reduction Of Fusion Cross Sectionsmentioning

confidence: 99%

The total reaction cross section of heavy-ion reactions induced by stable and unstable exotic beams: the low-energy regime

et al. 2020

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In this review paper we present a detailed account of the extraction and the calculation of the total reaction cross section of strongly bound and weakly bound, stable and unstable, exotic, nuclei. We discuss the optical model and the more general coupled channels model of direct reactions, and how from fits to the data on elastic scattering supplies the elastic element of (partial wave) S-matrix and correspondingly the differential cross section and the total reaction cross section. The effect of long-range absorption due to the coupling to excited states in the target and to the breakup continuum in the projectile is also discussed. The semiclassical method is then analyzed and the Hill-Wheeler expression of the tunneling probability and the Wong formula for the fusion and the total reaction cross sections are discussed in details. The generalized optical theorem for charged particle scattering and the resulting sum-of differences method is then discussed. Also, the strong absorption model in its sharp cutoff form and its generalization, the smooth cutoff, is discussed. The so-called "quarter-point recipe" is discussed next, and the quarter-point angle is introduced as a simple and rapid mean to obtain the total reaction cross section. The last topic discussed is the reduction of the total reaction cross section that would allow a large body of data to sit on a single universal function. Such a universal function exists in the case of the fusion data, and the aim of this last topic of the review is to extend the fusion case to the total reaction, by adding the direct reaction contribution. Also discussed is the inclusive breakup cross section and how it can be used to extract the total reaction cross section of the interacting fragment with the target. This method is also known as the Surrogate method and represents a case of hybrid reactions. The sum of the integrated inclusive breakup cross section with the complete fusion cross section supplies the total fusion cross section. The main experimental methods to determine the total reaction cross section are also discussed, with emphasis in recent techniques developed to deal with reactions induced by unstable beams.

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Section: Reduction Of Fusion Cross Sectionsmentioning

confidence: 99%

The total reaction cross section of heavy-ion reactions induced by stable and unstable exotic beams: the low-energy regime

et al. 2020

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“…Much interest within the nuclear physics community has been generated by the study of reactions with loosely bound nuclei, stable or radioactive [1,2]. Among the stable weakly bound nuclei, the most studied one is perhaps 6 Li, which in addition maintains a strong current interest [3][4][5][6][7][8]. As for radioactive projectiles, reactions induced by the neutron-halo nucleus 6 He have proved to be a most fruitful area of research for over two decades [2,[9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Optical model potentials have been obtained [3,11] which can describe simultaneously both the elastic scattering data and the fusion data reported for a given system. All systems analyzed correspond to medium-mass targets.…”

Section: Introductionmentioning

confidence: 99%

“…All systems analyzed correspond to medium-mass targets. For 6 Li projectiles, targets of 58 Ni, 59 Co, 64 Ni, 64 Zn have been considered [3] while for the halo projectile only the 64 Zn target was analyzed [11]. The formalism known as Extended Optical Model (EOM) [16,17] was used, where the potential is given by…”

Section: Introductionmentioning

confidence: 99%

“…Both the real and the imaginary parts of U D were supposed to have common values of radius and diffuseness, independent of energy, whose actual values for each system were given in Refs. [3,11], respectively. For the case of the 6 Li + ( 58 Ni, 59 Co, 64 Ni, 64 Zn) systems, the values of (r D , a D ) were (1.61, 0.68), (1.57, 0.84), (1.57, 0.91), and (1.60, 0.85) fm, respectively, while for 6 He + 64 Zn the corresponding values were (1.51, 1.22) fm.…”

Section: Introductionmentioning

confidence: 99%

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Threshold anomalies in low-energy reactions with loosely-bound projectiles

Aguilera,

Torabi,

Morales-Rivera

2023

J. Phys.: Conf. Ser.

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Recent results concerning data for fusion and elastic scattering of low-energy neutron-halo 6He and weakly-bound 6Li projectiles, colliding with medium mass targets, are briefly reviewed. The extended optical model (EOM) was used, which includes two complex polarization potentials, one associated to fusion couplings and the other one associated to direct reaction couplings. Four systems having 6Li projectiles and one with 6He were analyzed. The extracted threshold anomalies are discussed.

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Celebrating 20 Years of the São Paulo Potential

Gasques

2021

Braz J Phys

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Systematic study of elastic scattering and fusion induced by weakly bound 6Li on medium mass targets. Threshold anomalies

Cited by 10 publications

References 57 publications

The total reaction cross section of heavy-ion reactions induced by stable and unstable exotic beams: the low-energy regime

The total reaction cross section of heavy-ion reactions induced by stable and unstable exotic beams: the low-energy regime

Threshold anomalies in low-energy reactions with loosely-bound projectiles

Celebrating 20 Years of the São Paulo Potential

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