Fusion of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Ni</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>5</mml:mn><mml:mn>8</mml:mn><mml:mo>,</mml:mo><mml:mn>6</mml:mn><mml:mn>0</mml:mn><mml:mo>,</mml:mo><mml:mn>6</mml:mn><mml:mn>2</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>with 113-170 MeV<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" dis

Sikora, B.; Bisplinghoff, J.; Scobel, W.; Beckerman, M.; Blann, M.

doi:10.1103/physrevc.20.2219

Cited by 42 publications

(17 citation statements)

References 23 publications

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“…We recently performed these two reactions at INFN-Laboratori Nazionali di Legnaro (LNL) in Italy. The present measurements complement earlier studies on 40 Ca + 58 Ni [29], essentially at energies above the CB, and provide a detailed picture of the influence of the projectile and target nuclear structures on the fusion cross sections in both systems.…”

Section: Introduction and Background Studiessupporting

confidence: 79%

Barrier distributions and signatures of transfer channels in theCa40+Ni58,64fusion reactions at energies around a

et al. 2014

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Background: The nuclear structure of colliding nuclei is known to influence the fusion process. Couplings of the relative motion to nuclear shape deformations and vibrations lead to an enhancement of the sub-barrier fusion cross section in comparison with the predictions of one-dimensional barrier penetration models. This enhancement is explained by coupled-channels calculations including these couplings. The sub-barrier fusion cross section is also affected by nucleon transfer channels between the colliding nuclei. Purpose: The aim of the present experiment is to investigate the influence of the projectile and target nuclear structures on the fusion cross sections in the Ca-40 + Ni-58 and Ca-40 + Ni-64 systems. Methods: The experimental and theoretical fusion excitation functions as well as the barrier distributions were compared for these two systems. Coupled-channels calculations were performed using the CCFULL code. Results: Good agreement was found between the measured and calculated fusion cross sections for the Ca-40 + Ni-58 system. The situation is different for the Ca-40 + Ni-64 system where the coupled-channels calculations with no nucleon transfer clearly underestimate the fusion cross sections below the Coulomb barrier. The fusion excitation function was, however, well reproduced at low and high energies by including the coupling to the neutron pair-transfer channel in the calculations. Conclusions: The nuclear structure of the colliding nuclei influences the fusion cross sections below the Coulomb barrier for both Ca-40 + Ni-58,Ni-64 systems. Moreover, we highlighted the effect of the neutron pair-transfer channel on the fusion cross sections in Ca-40 + Ni-64

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Section: Introduction and Background Studiessupporting

confidence: 79%

Barrier distributions and signatures of transfer channels in theCa40+Ni58,64fusion reactions at energies around a

et al. 2014

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“…Figure 1 shows the measured reduced excitations functions for the 40 Ca + 58,64 Ni systems. The previous Sikora results for the 40 Ca + 58 Ni [9] system are also reported, in good agreement for the present measurement, except the last Sikora point, which should be noted is affected by 50 % error bar. The trend at low energies for the reduced 40 Ca + 64 Ni cross-section shows a different behavior, which is a first indication that some physics may be different for this system.…”

Section: Previous Results Concerning the Ca+ca And Ni+ni Systemssupporting

confidence: 78%

“…All structure characteristics of the target and projectile have been taken into account and we have shown that it is necessary to include transfer channels effects to reproduce the 40 Ca + 48 Ca data. Interestingly enough, Q values for the +2n, +3n and +4n transfer channels (from 48 What the Ca+Ni systems are concerned, in previous pionneering work by Sikora et al [9], more than 30 years ago, fusion excitation functions for 40 Ca + 58 Ni have been measured at energies above the barrier ranging from E lab = 113 to 170 MeV to extract information on the potentials and eventual neutron effecs. To our knowledge, this is the only published fusion excitation function result for the Ca+Ni systems.…”

Section: Previous Results Concerning the Ca+ca And Ni+ni Systemsmentioning

confidence: 99%

Exploring the influence of transfer channels on fusion reactions: the case of⁴⁰Ca +^58,64Ni

Bourgin

Courtin

Haas

et al. 2015

EPJ Web of Conferences

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Abstract. Fusion cross sections have been measured in the 40 Ca + 58 Ni and 40 Ca + 64 Ni systems at beam energies ranging from E lab = 104.75 MeV to 153.5 MeV using the Laboratori Nazionali di Legnaro electrostatic deflector. Distributions of barriers have been extracted from the experimental data. Preliminary coupled channel calculations were performed and hints of effects of neutron transfers on the fusion below the barrier in the 40 Ca + 64 Ni are discussed.

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“…Fusion above the classical barrier is reasonably well described by conventional one-dimensional fusion models using conservative nucleus-nucleus potentials [87], However, from recent experiments [88][89][90][91] The solid curve is a transmission calculation (WKB) using a proximity potential and assuming rigid sphercity for both target and projectile. The conventional fusion barrier is indicated by the arrow fusion well below the barrier (involving the quantum-mechanical penetration of the fusion barrier) cannot be described with such one-dimensional models of colliding rigid spheres involving WKB theory or the Hill-Wheeler expression for the transmission through a potential barrier.…”

Section: Coldfusion Through Barrier Penetrationmentioning

confidence: 99%

The Search for Superheavy Elements

Kratz¹

1983

Radiochimica Acta

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Superheavy elements /Predicted properties /Search for superheavy elements in nature ¡Attempted syntheses by heavy-ion reactions SummaryExtensive experimental efforts have been made during the past 12 years to detect superheavy elements in nature and to produce them in heavy-ion collisions. The search in nature remained inconclusive. Attempts to synthesize superheavy elements in the laboratory produced negative results. The concurrent study of heavy-ion reaction mechanisms has suggest new synthetic routes and modifications of old ones for future experiments.

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Fusion ofNi58,60,62with 113-170 MeV

Cited by 42 publications

References 23 publications

Barrier distributions and signatures of transfer channels in theCa40+Ni58,64fusion reactions at energies around a

Barrier distributions and signatures of transfer channels in theCa40+Ni58,64fusion reactions at energies around a

Exploring the influence of transfer channels on fusion reactions: the case of⁴⁰Ca +^58,64Ni

The Search for Superheavy Elements

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Fusion ofNi58,60,62with 113-170 MeV

Cited by 42 publications

References 23 publications

Barrier distributions and signatures of transfer channels in theCa40+Ni58,64fusion reactions at energies around a

Barrier distributions and signatures of transfer channels in theCa40+Ni58,64fusion reactions at energies around a

Exploring the influence of transfer channels on fusion reactions: the case of40Ca +58,64Ni

The Search for Superheavy Elements

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Exploring the influence of transfer channels on fusion reactions: the case of⁴⁰Ca +^58,64Ni