Measurements of isomeric yield ratios of fission products from proton-induced fission onnatU and232Th via direct ion counting

Rakopoulos, Vasileios; Lantz, Mattias; Al-Adili, Ali; Gorelov, D.; Jokinen, A.; Kolhinen, V. S.; Mattera, A.; Moore, I. D.; Penttilä, H.; Prokofiev, Alexander V.; Solders, Andreas; Pomp, Stephan

doi:10.1051/epjconf/201714604054

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…The uncertainties on the IYRs shown in table 1 are rather large, especially if compared to previous experimental campaigns at the same facility, that used direct ion counting with JYFLTRAP for nuclide identification [19]. In addition, the large uncertainties on the Evaluated Nuclear Data Libraries, also make it difficult to highlight any clear trend.…”

Section: Discussionmentioning

confidence: 88%

Production of Sn and Sb isotopes in high-energy neutron-induced fission of natU

et al. 2018

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The first systematic measurement of neutron-induced fission yields has been performed at the upgraded IGISOL-4 facility at the University of Jyväskylä, Finland. The fission products from high-energy neutron-induced fission of nat U were stopped in a gas cell filled with helium buffer gas, and were online separated with a dipole magnet. The isobars, with masses in the range A = 128-133, were transported to a tape-implantation station and identified using γ-spectroscopy. We report here the relative cumulative isotopic yields of tin (Z = 50) and the relative independent isotopic yields of antimony (Z = 51). Isomeric yield ratios were also obtained for five nuclides. The yields of tin show a staggered behaviour around A = 131, not observed in the ENDF/B-VII.1 evaluation. The yields of antimony also contradict the trend from the evaluation, but are in agreement with a calculation performed using the GEF model that shows the yield increasing with mass in the range A = 128-133.

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Section: Discussionmentioning

confidence: 88%

Production of Sn and Sb isotopes in high-energy neutron-induced fission of natU

et al. 2018

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“…We are also developing a methodology based on the one developed for DELFIN to help in the identification of initial FF spins from isomeric yield ratios measurements [15]. This work was supported by the Swedish Radiation Safety Authority (SSM), and by the Swedish Nuclear Fuel and Waste Management Co. (SKB).…”

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confidence: 99%

A methodology for the intercomparison of nuclear fission codes using TALYS

et al. 2017

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Abstract. Codes for the calculation of fission observables are frequently used to describe experimentally observed phenomena as well as provide predictions in cases where measurements are missing. Assumptions in the models, and tuning of parameters within the codes, often result in a good reproduction of experimental data. In this work we propose a methodology, coded in the newly developed program DELFIN (De-Excitation of FIssion fragmeNts), that can be used to compare some of the assumptions of the various models. Our code makes use of the fission fragments information after scission and processes them in an independent and consistent fashion to obtain measurable fission observables (such asν(A) distributions and Isomeric Fission Yield ratios).All the available information from the models, such as fragments' excitation energies, spin distributions and yields are provided as input to DELFIN that uses the nuclear reaction code TALYS to handle the deexcitation of the fission fragments. In this way we decouple the fragments relaxation from the actual fission models.We report here the first results of a comparison carried out on the GEF, Point-by-Point and FREYA models for thermal fission of 235 U and 239 Pu and spontaneous fission of 252 Cf.

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Measurement of yield ratios for the isomeric pair 137m,gCe in the 141Pr(γ,x)137m,gCe reactions with bremsstrahlung end-point energies of 50-, 60-, and 70-MeV

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et al. 2020

Radiation Physics and Chemistry

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Measurements of isomeric yield ratios of fission products from proton-induced fission on^natU and²³²Th via direct ion counting

Cited by 4 publications

References 14 publications

Production of Sn and Sb isotopes in high-energy neutron-induced fission of natU

Production of Sn and Sb isotopes in high-energy neutron-induced fission of natU

A methodology for the intercomparison of nuclear fission codes using TALYS

Measurement of yield ratios for the isomeric pair 137m,gCe in the 141Pr(γ,x)137m,gCe reactions with bremsstrahlung end-point energies of 50-, 60-, and 70-MeV

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