Recent Results from Lohengrin on Fission Yields and Related Decay Properties

Sérot, O.; Amouroux, C.; Bidaud, A.; Capellán, N.; Chabod, S.; Ebran, A.; Faust, H.; Kessedjian, G.; Köester, U.; Letourneau, A.; Litaize, O.; Martin, F.; Materna, T.; Mathieu, L.; Panebianco, S.; Régis, J.-M.; Rüdigier, M.; Sage, C.; Urban, W.

doi:10.1016/j.nds.2014.08.088

Cited by 15 publications

(8 citation statements)

References 4 publications

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“…Since 2010 our collaboration has developed a measurement program on fission fragment characteristics (yields, kinetic energy distributions...) at the LOHENGRIN spectrometer of the ILL [6]. The LOHENGRIN fission fragment separator is a double parabola mass spectrometer which combines an electric and a magnetic sectors.…”

Section: Experimental Sidementioning

confidence: 99%

Theoretical investigation of fission fragment kinetic energy distributions in the symmetric mass region for²³³U(n_th,f)

Chebboubi¹,

Sérot²,

Kessedjian³

et al. 2017

EPJ Web Conf.

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Abstract. Fission yields are essential for nuclear reactor studies (decay heat, fuel inventory. . . ) and constitute also one of the main observables needed to improve our understanding of the fission process. The symmetric mass region is of particular interest due to various intriguing properties of the fission fragments already reported in the literature : inversion of the nuclear charge polarization, large width of the fission fragment kinetic energy distribution, strong change of the prompt neutron multiplicity, etc. Recently, measurements of fission yields and kinetic energy distributions in the symmetric mass region were achieved at the LOHENGRIN mass spectrometer of the Institut Laue-Langevin (ILL). This experimental work is challenging due to the low counting rate and the appearance of contaminant masses, leading to pronounced components in the fission fragment kinetic energy distribution. Despite removing the undesirable contributions, the fission fragment kinetic energy distributions still show two components, indicating that the fission process could be modal. To go further and better characterize these components a comparison between our experimental data and Monte Carlo calculations (FIFRELIN code) simulating the de-excitation of the fission fragments for different fission channels will be presented and discussed.

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Section: Experimental Sidementioning

confidence: 99%

Theoretical investigation of fission fragment kinetic energy distributions in the symmetric mass region for²³³U(n_th,f)

Chebboubi¹,

Sérot²,

Kessedjian³

et al. 2017

EPJ Web Conf.

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“…Yet these matrices are compulsory to use nuclear data, in particular when it comes to propagate uncertainties. A collaboration among the French Alternative Energies and Atomic Energy Commission (CEA), the Laboratory of Subatomic Physics and Cosmology (LPSC) and the Institut Laue-Langevin (ILL), started in 2009, aims at tackling these issues by providing precise measurements of fission yields with the related experimental covariance matrices for major actinides [5]. In particular for the 241 Pu nuclide which is a major isotope in the context of multi-recycling and which is investigated in the present work.…”

Section: Introductionmentioning

confidence: 99%

A study of the construction of the correlation matrix of ²⁴¹Pu(nth,f) isobaric fission yields

Julien-Laferrière

Chebboubi

Kessedjian

et al. 2018

EPJ Nuclear Sci. Technol.

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Two blind analyses for 241 Pu(nth,f) isobaric fission yields have been conducted, one analysis using a mix of a Monte-Carlo and an analytical method, the other one relying only on analytical calculations. The calculations have been derived from the same analysis path and experimental data, obtained on the LOHENGRIN mass spectrometer at the Institut Laue-Langevin. The comparison between the two analyses put into lights several biases and limits of each analysis and gives a comprehensive vision on the construction of the correlation matrix. It gives confidence in the analysis scheme used for the determination of the fission yields and their correlation matrix. *

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“…Additionally, some discrepancies between the major libraries exist and need to be understood. For these reasons, a collaboration of the LPSC, the CEA and the ILL focuses on producing precise measurements of fission yields for major actinides with their related experimental variance-covariance matrice [6]. In this document, the 241 Pu thermal neutron induced fission isobaric yields and fission product kinetic energy distribution as function of the fission product mass will be addressed.…”

Section: Introductionmentioning

confidence: 99%

New measurements on isobaric fission product yields and mean kinetic energy for ²⁴¹Pu thermal neutron-induced fission

et al. 2018

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Abstract. Nuclear fission yields data measurements for thermal neutron induced fission of 241 Pu have been carried out at the Institut Laue Langevin (ILL) in Grenoble, using the Lohengrin mass spectrometer. Mass, isotopic and isomeric yields have been extracted for the last measurements. A focus is given in this document to the mass yield results which are obtained for almost the entire heavy peak and most of the light high yields masses, along with the covariance matrix. The mean kinetic energy as a function of the fission product mass has also been extracted from the measurements. The total mean kinetic energy pre and post neutron emission have been assessed and compared to other works showing a rather good agreement.

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Recent Results from Lohengrin on Fission Yields and Related Decay Properties

Cited by 15 publications

References 4 publications

Theoretical investigation of fission fragment kinetic energy distributions in the symmetric mass region for²³³U(n_th,f)

Theoretical investigation of fission fragment kinetic energy distributions in the symmetric mass region for²³³U(n_th,f)

A study of the construction of the correlation matrix of ²⁴¹Pu(nth,f) isobaric fission yields

New measurements on isobaric fission product yields and mean kinetic energy for ²⁴¹Pu thermal neutron-induced fission

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Recent Results from Lohengrin on Fission Yields and Related Decay Properties

Cited by 15 publications

References 4 publications

Theoretical investigation of fission fragment kinetic energy distributions in the symmetric mass region for233U(nth,f)

Theoretical investigation of fission fragment kinetic energy distributions in the symmetric mass region for233U(nth,f)

A study of the construction of the correlation matrix of 241Pu(nth,f) isobaric fission yields

New measurements on isobaric fission product yields and mean kinetic energy for 241Pu thermal neutron-induced fission

Contact Info

Product

Resources

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Theoretical investigation of fission fragment kinetic energy distributions in the symmetric mass region for²³³U(n_th,f)

Theoretical investigation of fission fragment kinetic energy distributions in the symmetric mass region for²³³U(n_th,f)

A study of the construction of the correlation matrix of ²⁴¹Pu(nth,f) isobaric fission yields

New measurements on isobaric fission product yields and mean kinetic energy for ²⁴¹Pu thermal neutron-induced fission