Results from the IAEA Benchmark of Spallation Models

Leray, S.; David, J. C.; Khandaker, Mayeen Uddin; Mank, G.; Mengoni, A.; Otsuka, Naoto; Filges, D.; Gallmeier, Franz X.; Konobeyev, A.Yu.; Michel, R.

doi:10.3938/jkps.59.791

Cited by 75 publications

(64 citation statements)

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“…Coupled to the ABLA de-excitation code from GSI [2], INCL4 has been extensively compared with experimental data covering a wide range of reaction channels and continuously improved during the last years. In the benchmark of spallation models organized recently under the auspices of IAEA [3], the combination of the INCL4.5 and ABLA07 [4] versions was found [5] to be one of the models giving the best overall agreement with the experimental data.…”

Section: Introductionsupporting

confidence: 50%

Recent Developments of the Liège Intranuclear Cascade Model in View of its Use into High-energy Transport Codes

Leray

Boudard

Braunn

et al. 2014

Nuclear Data Sheets

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Section: Introductionsupporting

confidence: 50%

Recent Developments of the Liège Intranuclear Cascade Model in View of its Use into High-energy Transport Codes

Leray

Boudard

Braunn

et al. 2014

Nuclear Data Sheets

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“…The INCL/ABLA07 coupling is in general quite successful at describing a vast number of observables in nucleon-induced reactions at incident energies between ∼60 and 3000 MeV [2]. For technical reasons, the work described hereafter was performed with the latest C++ version of the INCL code (INCL++ v5.1.14) [7].…”

Section: A Model Descriptionmentioning

confidence: 99%

“…Despite the simplicity of such reaction models, it was proved that they are able to describe a vast array of experimental observables with a very restricted number of free parameters [2]. However, it was realized some time ago that these models systematically fail to describe inclusive cross sections for the removals of few nucleons, for example, [3,4].…”

Section: Introductionmentioning

confidence: 99%

Improving the description of proton-induced one-nucleon removal in intranuclear-cascade models

et al. 2015

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It is a well-established fact that intranuclear-cascade models generally overestimate the cross sections for one-proton removal from heavy, stable nuclei by a high-energy proton beam, but they yield reasonable predictions for one-neutron removal from the same nuclei and for one-nucleon removal from light targets. We use simple shell-model calculations to investigate the reasons for this deficiency. We find that a refined description of the neutron skin and of the energy density in the nuclear surface is crucial for the aforementioned observables, and that neither ingredient is sufficient if taken separately. As a by-product, the predictions for removal of several nucleons are also improved by the refined treatment.

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“…The validity of the INCL model in the 50-MeV to 3-GeV incident-energy range has been extensively demonstrated by the recent "Benchmark of Spallation Models" [12,13], sponsored by IAEA. We assume that INCL provides an accurate description of the initial stage of spallation reactions within the energy range above.…”

Section: Models For the Entrance Channelmentioning

confidence: 99%

Simultaneous fitting of statistical-model parameters to symmetric and asymmetric fission cross sections

Mancusi

Charity

2013

J. Phys.: Conf. Ser.

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Abstract. The de-excitation of compound nuclei has been successfully described for several decades by means of statistical models. However, accurate predictions require some fine-tuning of the model parameters. This task can be simplified by studying several entrance channels, which populate different regions of the parameter space of the compound nucleus.Fusion reactions play an important role in this strategy because they minimise the uncertainty on the entrance channel by fixing mass, charge and excitation energy of the compound nucleus. If incomplete fusion is negligible, the only uncertainty on the compound nucleus comes from the spin distribution. However, some de-excitation channels, such as fission, are quite sensitive to spin. Other entrance channels can then be used to discriminate between equivalent parameter sets.The focus of this work is on fission and intermediate-mass-fragment emission cross sections of compound nuclei with 70 A 240. The statistical de-excitation model is GEMINI++. The choice of the observables is natural in the framework of GEMINI++, which describes fragment emission using a fissionlike formalism. Equivalent parameter sets for fusion reactions can be resolved using the spallation entrance channel. This promising strategy can lead to the identification of a minimal set of physical ingredients necessary for a unified quantitative description of nuclear de-excitation. IntroductionThe de-excitation of an excited nucleus is a qualitatively well-understood phenomenon which is often described by means of statistical models. However, such models contain a great deal of free parameters and ingredients that are often underconstrained by the available experimental data. Quantitatively accurate predictions usually require some tuning of the model parameters.The fusion entrance channel is a particularly powerful tool to explore the sensitivity of the deexcitation model to the compound-nucleus parameters (mass, charge, excitation energy and spin); if the cross sections for incomplete fusion and pre-equilibrium emission are negligible with respect to the fusion cross section for a given projectile-target combination, the compound nucleus can essentially be regarded as having a fixed mass, charge and total excitation energy (intrinsic plus collective), thereby fixing three of the four parameters that describe it. The requirement of complete fusion, however, puts an upper limit on the energy of the projectile and, thus, on the excitation energies that can be studied with this method. Because of this and other similar limitations on the entrance channel, one is actually able to construct different parameter sets that can describe the same experimental data to a similar degree of accuracy; in this sense, statistical de-excitation models contain partly degenerate ingredients, and that limits their predictive power.

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Results from the IAEA Benchmark of Spallation Models

Cited by 75 publications

References 0 publications

Recent Developments of the Liège Intranuclear Cascade Model in View of its Use into High-energy Transport Codes

Recent Developments of the Liège Intranuclear Cascade Model in View of its Use into High-energy Transport Codes

Improving the description of proton-induced one-nucleon removal in intranuclear-cascade models

Simultaneous fitting of statistical-model parameters to symmetric and asymmetric fission cross sections

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