Macroscopic-microscopic approach to the nuclear fission process

Kelić, A.; Ricciardi, M. V.; Schmidt, Karl‐Heinz

doi:10.1051/ndata:07674

Cited by 13 publications

(23 citation statements)

References 24 publications

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“…The ion-optical transmission has been calculated by using the Monte-Carlo simulation program MOCADI [13] taking into account the different kinematics of projectile fragmentation and fission. The contribution of each reaction type was determined for the observed nuclides by the ABRABLA code [14]. In Figure 3 an example is shown for the measured Sm and Pt isotopes [2] compared with different theoretical predictions.…”

Section: Discovery Of New Neutron-rich Isotopesmentioning

confidence: 99%

Recent Precision Experiments with Exotic Nuclei Produced with Uranium Projectiles and Experimental Prospects at Fair

Geißel

Chen

Dickel

et al. 2014

EPJ Web of Conferences

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Abstract.Precision experiments with relativistic fragments separated in-flight require special experimental methods to overcome the inherent large emittance from the creation in nuclear reactions and atomic interactions in matter. At GSI relativistic exotic nuclei have been produced via uranium projectile fragmentation and fission and investigated with the inflight separator FRS directly, or in combination with either the storage-cooler ring ESR or the FRS Ion Catcher. 1000 A·MeV 238 U ions were used to create 60 new neutron-rich isotopes separated and identified with the FRS to measure their production cross sections. In another experimental campaign the fragments were separated in flight and injected into the storage-cooler ring ESR for accurate mass and lifetime measurements. In these experiments we have obtained accurate new mass values analyzed via a novel method which has reduced the systematic errors for both Schottky Mass Spectrometry (SMS) and for Isochronous Mass Spectrometry (IMS). Pioneering experiments have been carried out with the FRS Ion Catcher consisting of three experimental components, the dispersive magnetic system of the FRS with a monoenergetic and a homogeneous degrader, a cryogenic stopping cell filled with pure helium and a multiple-reflection time-of flight mass separator. The FRS Ion Catcher enables high precision spectroscopy experiments with eV to keV exotic nuclides. Results from these different FRS experiments are presented in this overview together with prospects for the next-generation facility Super-FRS. The novel features of the Super-FRS compared with the present FRS will be discussed in addition.

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Section: Discovery Of New Neutron-rich Isotopesmentioning

confidence: 99%

Recent Precision Experiments with Exotic Nuclei Produced with Uranium Projectiles and Experimental Prospects at Fair

Geißel

Chen

Dickel

et al. 2014

EPJ Web of Conferences

View full text Add to dashboard Cite

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“…As compared to other statistical models, ABLA possesses some specific assets. These comprise a parameterization of the fission-decay width which accounts to some extend and in an effective way for friction effects along the path to fission, and the explicitly account of an elaborate empirical potential landscape for the determination of fission fragment properties [9]. Though, like any statistical model, the ABLA software does not give a direct access to a true time for the decay.…”

Section: Dynamical Decay Of the Spectator Prefragmentmentioning

confidence: 99%

“…To describe the entire reaction, from the early collision up to the final cold products are reached, the ABRA code is usually combined with the statistical evaporation model ABLA [9]. In its most general form, the ABRABLA code consists of three stages: (1) abrasion (ABRA), (2) if the temperature of the remnant after abrasion is above a limiting value (around 4.5 MeV), the system breaks up in several more or less heavy intermediate products [23], (3) de-excitation (ABLA) of the heavy remnants from stage (1) or (1)+(2).…”

Section: B Statistical Abrasion Model Of Gaimard-schmidtmentioning

confidence: 99%

“…Other channels are not treated here. The dynamical results are compared to the predictions by the abrasion-ablation statistical model ABRABLA [8,9] which has shown successful in predicting the spectator decay in the beam energy range from about 100 to several thousands of MeV/nucleon. As a test case for our new dynamical framework, we study the reaction 208 Pb+ 208 Pb at 158 GeV/nucleon energy ( √ s N N = 17.3 GeV) measured at the CERN SPS at various centralities [10], and for which electromagnetic distortions were observed in the kinematical pion distributions.…”

Section: Introductionmentioning

confidence: 99%

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Dynamical evolution of spectator systems produced in ultrarelativistic heavy-ion collisions

et al. 2018

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In peripheral heavy-ion collisions at ultra-relativistic energies, usually only parts of the colliding nuclei effectively interact with each other. In the overlapping zone, a fireball or quark-gluon plasma is produced. The excitation energy of the heavy remnant can range from a few tens to several hundreds of MeV, depending on the impact parameter. The decay of these excited spectators is investigated in this work for the first time within a dynamical approach based on the multidimensional stochastic Langevin equation. The potential of this exploratory work to understand the connection between electromagnetic fields generated by the heavy spectators and measured pion distributions is discussed.

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“…In this work use is made of version 5.2 [3] of INCL++, including multiple pion production as described in Ref. [4], and thus allowing calculations up to 10-12 GeV, while version 5.1.14 adopted in our previous work [1] described only single pion production from the decay of delta resonances; the versions of the evaporationfission models yielding fission cross sections, GEMINI++ [5] and ABLA07 [6], are the same as in Ref. [1], so that the changes of input parameters and of numerical results below 1 GeV are entirely connected with the new version of the fast cascade model.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo calculations of nucleon-induced fission in the GeV energy range

et al. 2017

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Abstract. In the present work the Monte Carlo calculations of nucleon-induced fission on actinides and preactinides from 100 MeV to 1 GeV, described in a recent paper of ours [1], are extended up to an incident energy of 8 GeV. The calculated (p,f) cross sections are compared with the few experimental data available in the literature. The same model parameters are used to predict (n,f) cross sections in the same energy range. Possible shortcomings of decay models at high incident energies are discussed.

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Macroscopic-microscopic approach to the nuclear fission process

Abstract: Abstract.A model based on the macroscopic-microscopic approach for calculating the fission-fragment properties is presented. Using this model, a large set of experimental data measured in low-and high-energy fission can be reproduced using one and same set of model parameters.

Cited by 13 publications

References 24 publications

Recent Precision Experiments with Exotic Nuclei Produced with Uranium Projectiles and Experimental Prospects at Fair

Recent Precision Experiments with Exotic Nuclei Produced with Uranium Projectiles and Experimental Prospects at Fair

Dynamical evolution of spectator systems produced in ultrarelativistic heavy-ion collisions

Monte Carlo calculations of nucleon-induced fission in the GeV energy range

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