Synthesis of transactinide nuclei using radioactive beams

Loveland, W.

doi:10.1103/physrevc.76.014612

Cited by 152 publications

(117 citation statements)

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“…(1), the determination of P CN contains the most uncertainty which can be as much as 1−2 orders of magnitude [20,21]. Experimentally, P CN can be extracted from the measurement of fusion-evaporation residue crosssections [22,23].…”

Section: Introductionmentioning

confidence: 99%

Shape evolution and collective dynamics of quasifission in the time-dependent Hartree-Fock approach

2015

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Background: At energies near the Coulomb barrier, capture reactions in heavy-ion collisions result either in fusion or in quasifission. The former produces a compound nucleus in statistical equilibrium, while the second leads to a reseparation of the fragments after partial mass equilibration without formation of a compound nucleus. Extracting the compound nucleus formation probability is crucial to predict superheavy-element formation crosssections. It requires a good knowledge of the fragment angular distribution which itself depends on quantities such as moments of inertia and excitation energies which have so far been somewhat arbitrary for the quasifission contribution.Purpose: Our main goal is to utlize the time-dependent Hartee-Fock (TDHF) approach to extract ingredients of the formula used in the analysis of experimental angular distributions. These include the moment-of-inertia and temperature.Methods: We investigate the evolution of the nuclear density in TDHF calculations leading to quasifission. We study the dependence of the relevant quantities on various initial conditions of the reaction process.Results: The evolution of the moment of inertia is clearly non-trivial and depends strongly on the characteristics of the collision. The temperature rises quickly when the kinetic energy is transformed into internal excitation. Then, it rises slowly during mass transfer.Conclusions: Fully microscopic theories are useful to predict the complex evolution of quantities required in macroscopic models of quasifission.

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Section: Introductionmentioning

confidence: 99%

Shape evolution and collective dynamics of quasifission in the time-dependent Hartree-Fock approach

2015

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“…However, as seen in Fig. 2b, the values of P CN differ significantly in these post dictions [2][3][4][5], and differ from measurements of P CN [6]. A similar situation occurs in predictions of cross sections for hot fusion reactions.…”

Section: Introductionmentioning

confidence: 70%

“…. The references cited in the legends refer to Adamian [4], Feng [5], Swiatecki [2], and Loveland [3]. The additional reference in panel (b) is to the data of Naik et al [6].…”

Section: Introductionmentioning

confidence: 99%

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Characterizing the mechanism(s) of heavy element synthesis reactions

Loveland

2016

EPJ Web Conf.

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Abstract.A review of the current state of our understanding of complete fusion reaction mechanisms is presented, from the perspective of an experimentalist. For complete fusion reactions, the overall uncertainties in predicting heavy element synthesis cross sections are examined in terms of the uncertainties associated with the calculations of capture cross sections, fusion probabilities and survival probabilities.

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“…The coupling to neutron transfer may be important for reactions involving neutron-rich radioactive nuclei because for some projectile and target combinations there are a large number of positive Q-value transfer channels. This is particularly interesting for the synthesis of superheavy elements since neutron-rich radioactive beams may ultimately be used for such experiments [2]. Moreover, neutron transfer is predicted to enhance the fusion of neutron-rich nuclei occurring in the crust of accreting neutron stars [3].…”

Section: Introductionmentioning

confidence: 99%