Advanced Monte Carlo modeling of prompt fission neutrons for thermal and fast neutron-induced fission reactions on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Pu</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>239</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

Talou, P.; Becker, Boris W.; Kawano, Toshihiko; Chadwick, M.B.; Danon, Y.

doi:10.1103/physrevc.83.064612

Cited by 91 publications

(74 citation statements)

References 35 publications

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“…http://pos.sissa.it different nuclear temperatures for the fission fragments, as in [5]. Some results for the fission of 238 U with 14.5 MeV neutrons, obtained with this model, are shown in figure 4.…”

Section: Pos(baldin Ishepp Xxi)088mentioning

confidence: 99%

Investigation of the possibility to use ion beams for energy production in uranium target

Paraipan¹,

Baldin²,

Kadykov³

et al. 2013

Proceedings of XXI International Baldin Seminar on High Energy Physics Problems — PoS(Baldin ISHEPP XXI)

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Proton and ion beams with the initial energy between 0.2 AGeV and 10 AGeV were analyzed with respect to the neutron production in different targets, the number and spatial distribution of fission acts and the energy deposited in uranium targets. In this energy range two models for the hadronic inelastic interaction are suitable: bertini cascade and binary cascade. In thin and medium thickness targets both models produce results in good agreement with the experimental data. In very thick targets the use of binary cascade gives neutron production about two times lower than the bertini cascade and the experimental data. For this reason the last model was chosen for the modeling of the hadronic inelastic interaction. In large uranium target the total number of fission acts ( the energy deposited) per incident particle, reported to the energy spent to accelerate the particle and to the total number of fission acts (the energy deposited) per incident proton with the same energy per nucleon increases with the mass number of ion. Such dependence for the number of fission acts shows a quick rise for ions until Fe, followed by a slower increase. The simulations performed show that from the point of view of the energetic balance (neglecting the problem of a suitable beam intensity) it seems more useful to accelerate at the same energy per nucleon, ions with mass number between Ca and Fe, than protons.

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Section: Pos(baldin Ishepp Xxi)088mentioning

confidence: 99%

Investigation of the possibility to use ion beams for energy production in uranium target

Paraipan¹,

Baldin²,

Kadykov³

et al. 2013

Proceedings of XXI International Baldin Seminar on High Energy Physics Problems — PoS(Baldin ISHEPP XXI)

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“…Properties of prompt fission neutrons and γ rays, emitted before the weak decays of the fission fragments toward stability, are important for both nuclear technologies and a better understanding of the fission process. Significant effort has been directed to the study of prompt fission neutron properties [1][2][3][4][5], in particular the average spectrum and multiplicity, but the properties of the prompt γ rays have been less studied. Hence, uncertainties on nuclear data needed for fast reactors are large, given that even in the well known thermal power reactors, the local γ heating can be under predicted by up to 30% [6].…”

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confidence: 99%

Properties of prompt-fissionγrays

et al. 2014

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In a Monte-Carlo Hauser-Feshbach statistical framework, we describe spectra, average multiplicities, average energy and multiplicity distributions of the prompt γ rays produced in the thermal neutron-induced fission of 235 U and 239 Pu, and the spontaneous fission of 252 Cf. Comparisons against recent experimental data show reasonable agreement in all cases investigated, after adjustment of the initial spin distribution in the fission fragments. In particular, when we include in the calculation the Doppler broadening we obtain a qualitatively good description of the measured low-energy spectra, where contributions from collective discrete transitions in specific fragments can be identified. At higher energies, both the calculated neutron and γ-ray spectra are softer than experimental data. The impact of selected model parameters on the prompt neutron and γ-ray spectra is analyzed. Finally, we present prompt γ spectrum and multiplicity distribution for the neutron-induced fission of 235 U for 5.5 MeV neutron incident energy, just below the threshold for second-chance fission.

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“…The distribution of excitation energy between the fragments [7,8] is also a very disputed question [9][10][11][12]. In order to guide theory, it is important to provide theorists and evaluators with experimental data containing as many correlations as possible between the different observables, such as fragments mass, charge, kinetic energy and emitted particle multiplicities.…”

Section: Introductionmentioning

confidence: 99%

The new double energy-velocity spectrometer VERDI

et al. 2017

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Abstract. VERDI (VElocity foR Direct particle Identification) is a fission-fragment spectrometer recently put into operation at JRC-Geel. It allows measuring the kinetic energy and velocity of both fission fragments simultaneously. The velocity provides information about the pre-neutron mass of each fission fragment when isotropic prompt-neutron emission from the fragments is assumed. The kinetic energy, in combination with the velocity, provides the post-neutron mass. From the difference between pre-and post-neutron masses, the number of neutrons emitted by each fragment can be determined. Multiplicity as a function of fragment mass and total kinetic energy is one important ingredient, essential for understanding the sharing of excitation energy between fission fragments at scission, and may be used to benchmark nuclear de-excitation models. The VERDI spectrometer design is a compromise between geometrical efficiency and mass resolution. The spectrometer consists of an electron detector located close to the target and two arrays of silicon detectors, each located 50 cm away from the target. In the present configuration pre-neutron and post-neutron mass distributions are in good agreement with reference data were obtained. Our latest measurements performed with spontaneously fissioning 252 Cf is presented along with the developed calibration procedure to obtain pulse height defect and plasma delay time corrections.

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Advanced Monte Carlo modeling of prompt fission neutrons for thermal and fast neutron-induced fission reactions onPu239

Cited by 91 publications

References 35 publications

Investigation of the possibility to use ion beams for energy production in uranium target

Investigation of the possibility to use ion beams for energy production in uranium target

Properties of prompt-fissionγrays

The new double energy-velocity spectrometer VERDI

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