Calculated nuclide production yields in relativistic collisions of fissile nuclei

Benlliure, J.; Grewe, A.; Jong, M. de; Schmidt, Karl‐Heinz; Zhdanov, S.V.

doi:10.1016/s0375-9474(97)00607-6

Cited by 163 publications

(123 citation statements)

References 58 publications

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“…However, the distribution of the products covers a large part of the nuclide chart and is extended down to very light elements as Na and Ne [19]. In general, fission of heavy fissile nuclides as 238 U, 232 Th is a powerful tool that gives access to very neutron-rich isotopes [28].…”

Section: Nuclide Production and Extraction Mechanisms In Isol Targetsmentioning

confidence: 99%

Systematic comparison of ISOLDE-SC yields with calculated in-target production rates

Lukić

Gevaert

Kelić

et al. 2006

Nuclear Instruments and Methods in Physics Research Section A:

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Recently, a series of dedicated inverse-kinematics experiments performed at GSI, Darmstadt, has brought an important progress in our understanding of proton and heavy-ion induced reactions at relativistic energies. The nuclear reaction code ABRABLA that has been developed and benchmarked against the results of these experiments has been used to calculate nuclide production cross sections at different energies and with different targets and beams. These calculations are used to estimate nuclide production rates by protons in thick targets, taking into account the energy loss and the attenuation of the proton beam in the target, as well as the low-energy fission induced by the secondary neutrons. The results are compared to the yields of isotopes of various elements obtained from different targets at CERN-ISOLDE with 600 MeV protons, and the overall extraction efficiencies are deduced. The dependence of these extraction efficiencies on the nuclide half-life is found to follow a simple pattern in many different cases. A simple function is proposed to parameterize this behavior in a way that quantifies the essential properties of the extraction efficiency for the element and the targetion-source system in question.

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Section: Nuclide Production and Extraction Mechanisms In Isol Targetsmentioning

confidence: 99%

Systematic comparison of ISOLDE-SC yields with calculated in-target production rates

Lukić

Gevaert

Kelić

et al. 2006

Nuclear Instruments and Methods in Physics Research Section A:

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“…The number of released neutrons in Panov et al (2008) has been estimated as a function of charge and mass number of the fissioning nucleus and can reach 10 per fragment for nuclei near the drip line. The ABLA07 model is based on a statistical model considering shell effects in the fragments from theoretical predictions and has been tested to provide an accurate description of known fission data, including the number of released neutrons (Gaimard & Schmidt 1991;Benlliure et al 1998;Kelic et al 2009). It also includes the reproduction of fragment distributions from extended heavy ion collision yields (Kelic et al 2008), and therefore goes far beyond the areas in the nuclear chart where spontaneous, β-delayed, or neutron-induced fission yields are known experimentally.…”

Section: The Treatment Of Fission In Nuclear Networkmentioning

confidence: 99%

THE ROLE OF FISSION IN NEUTRON STAR MERGERS AND ITS IMPACT ON THEr-PROCESS PEAKS

Eichler¹,

Arcones²,

Kelić³

et al. 2015

ApJ

178

164

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Comparing observational abundance features with nucleosynthesis predictions of stellar evolution or explosion simulations, we can scrutinize two aspects: (a) the conditions in the astrophysical production site and (b) the quality of the nuclear physics input utilized. We test the abundance features of r-process nucleosynthesis calculations for the dynamical ejecta of neutron star merger simulations based on three different nuclear mass models: The Finite Range Droplet Model, the (quenched version of the) Extended Thomas Fermi Model with Strutinsky Integral, and the Hartree-Fock-Bogoliubov mass model. We make use of corresponding fission barrier heights and compare the impact of four different fission fragment distribution models on the final r-process abundance distribution. In particular, we explore the abundance distribution in the second r-process peak and the rare-earth sub-peak as a function of mass models and fission fragment distributions, as well as the origin of a shift in the third r-process peak position. The latter has been noticed in a number of merger nucleosynthesis predictions. We show that the shift occurs during the r-process freeze-out when neutron captures and β-decays compete and an (n,γ)-(γ,n) equilibrium is no longer maintained. During this phase neutrons originate mainly from fission of material above A = 240. We also investigate the role of β-decay half-lives from recent theoretical advances, which lead either to a smaller amount of fissioning nuclei during freeze-out or a faster (and thus earlier) release of fission neutrons, which can (partially) prevent this shift and has an impact on the second and rare-earth peak as well.

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“…Finally, if fission is reached, the mass-and atomic-number distributions of the fission fragments are described by the semiempirical model proposed in Ref. [29].…”

Section: Model Calculationsmentioning

confidence: 99%

Dissipative effects in fission investigated with proton-on-lead reactions

Rodríguez-Sànchez

Benlliure

Taïeb

et al. 2016

EPJ Web of Conferences

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The complete kinematic measurement of the two fission fragments permitted us to investigate dissipative effects at large deformations, between the saddle-point and the corresponding scission configurations. Up to now, this kind of study has only been performed with fusionfission reactions using a limited number of observables, such as the mass distribution of the fission fragments or the neutron multiplicities. However, the large angular momenta gained by the compound nucleus

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Calculated nuclide production yields in relativistic collisions of fissile nuclei

Cited by 163 publications

References 58 publications

Systematic comparison of ISOLDE-SC yields with calculated in-target production rates

Systematic comparison of ISOLDE-SC yields with calculated in-target production rates

THE ROLE OF FISSION IN NEUTRON STAR MERGERS AND ITS IMPACT ON THEr-PROCESS PEAKS

Dissipative effects in fission investigated with proton-on-lead reactions

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