Needs of Accurate Prompt and Delayed γ-spectrum and Multiplicity for Nuclear Reactor Designs

Rimpault, G.; Bernard, D.; Blanchet, David; Vaglio–Gaudard, C.; Ravaux, S.; Santamarina, A.

doi:10.1016/j.phpro.2012.04.002

Cited by 49 publications

(27 citation statements)

References 8 publications

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“…One of the least measured parts of the energy that is released in fission is the contribution that is carried away via prompt γ-ray emission. This accounts for roughly 8 MeV [4,5], or around 5% [6] of the total energy released in fission. In addition, prompt energy is dissipated via the Coulomb repulsion of the fragments, and the emission of prompt neutrons.…”

Section: Introductionmentioning

confidence: 99%

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*
Rose
¹
,
Zeiser²,
Wilson³
et al. 2017
Phys. Rev. C
12
1
11
0
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Prompt fission γ-rays are responsible for approximately 5% of the total energy released in fission, and therefore important to understand when modelling nuclear reactors. In this work we present prompt γ-ray emission characteristics in fission, for the first time as a function of the nuclear excitation energy of the fissioning system. Emitted γ-ray spectra were measured, and γ-ray multiplicities and average and total γ energies per fission were determined for the 233 U(d,pf) reaction for excitation energies between 4.8 and 10 MeV, and for the 239 Pu(d,pf) reaction between 4.5 and 9 MeV. The spectral characteristics show no significant change as a function of excitation energy above the fission barrier, despite the fact that an extra ∼5 MeV of energy is potentially available in the excited fragments for γ-decay. The measured results are compared to model calculations made for prompt γ-ray emission with the fission model code GEF. Further comparison with previously obtained results from thermal neutron induced fission is made to characterize possible differences arising from using the surrogate (d,p) reaction. PACS numbers: 25.85.Ge 24.75.+i 07.85.Nc

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Section: Introductionmentioning

confidence: 99%

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*
Rose
¹
,
Zeiser²,
Wilson³
et al. 2017
Phys. Rev. C
12
1
11
0
View full text Add to dashboard Cite

show abstract

“…The measurement of the prompt γ -ray spectrum (PFGS) is quite important to study the de-excitation process of neutron-rich fission fragments [1] as well as to generate data required to design new types of reactors, such as the Generation-IV reactors and advanced lightwater reactors (Generation-III + reactors) [2]. The PFGS measured for spontaneous fission of 252 Cf [3,4] does not decrease linearly with γ -ray energy on a logarithmic scale but shows a broad hump at γ -ray energies of E γ ≥ 8 MeV.…”

Section: Introductionmentioning

confidence: 99%

Measurement of high-energy prompt gamma-rays from neutron induced fission of U-235

Makii

Nishio²,

Hirose³

et al. 2017

EPJ Web Conf.

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Abstract.We have developed a new setup to measure prompt γ -rays from the 235 U(n th , f ) reaction. The setup consists of two multi-wire proportional counters (MWPCs) to detect the fission fragments, two LaBr 3 (Ce) scintillators to measure the γ -rays. The highly efficient setup was installed at the PF1B beam line of the Institut Laue Langevin (ILL). We have successfully measured the γ -ray spectrum up to about 20 MeV for the fist time in neutron-induced fission.

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“…These new experimental efforts were motivated by requests for new characteristic spectral data, especially for Ȗ -ray multiplicity and mean photon energy per fission in thermal-and fast-neutron induced fission of 235 U and 239 Pu [22]. Both isotopes are considered the most important ones with respect to the modelling of innovative cores required for fast-spectrum Generation-IV reactors [23]. Instrumental advancements like the development of new γ-ray detectors as well as digital data-acquisition systems made the determination of new and improved prompt fission γ-ray spectral (PFGS) characteristics possible with high precision.…”

Section: Prompt γ γ γ γ-Ray Emission In Fissionmentioning

confidence: 99%

Fission cross-sections, prompt fission neutron and γ-ray emission in request for nuclear applications

Hambsch

Salvador-Castiñeira

Oberstedt

et al. 2016

EPJ Web of Conferences

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Abstract. In recent years JRC-IRMM has been investigating fission cross-sections of 240,242 Pu in the fast-neutron energy range relevant for innovative reactor systems and requested in the High Priority Request List (HPRL) of the OECD/Nuclear Energy Agency (NEA). In addition to that, prompt neutron multiplicities are being investigated for the major isotopes 235 U, 239 Pu in the neutron-resonance region using a newly developed scintillation detector array (SCINTIA) and an innovative modification of the Frisch-grid ionisation chamber for fission-fragment detection. These data are highly relevant for improved neutron data evaluation and requested by the OECD/Working Party on Evaluation Cooperation (WPEC). Thirdly, also prompt fission γ-ray emission is investigated using highly efficient lanthanide-halide detectors with superior timing resolution. Again, those data are requested in the HPRL for major actinides to solve open questions on an under-prediction of decay heat in nuclear reactors. The information on prompt fission neutron and γ-ray emission is crucial for benchmarking nuclear models to study the de-excitation process of neutron-rich fission fragments. Information on γ-ray emission probabilities is also useful in decommissioning exercises on damaged nuclear power plants like Fukushima Daiichi to which JRC-IRMM is contributing. The results on the 240,242 Pu fission cross section, 235 U prompt neutron multiplicity in the resonance region and correlations with fission fragments and prompt γ-ray emission for several isotopes will be presented and put into perspective.

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Needs of Accurate Prompt and Delayed γ-spectrum and Multiplicity for Nuclear Reactor Designs

Cited by 49 publications

References 8 publications

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*
Rose
¹
,
Zeiser²,
Wilson³
et al. 2017
Phys. Rev. C
12
1
11
0
View full text Add to dashboard Cite

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*
Rose
¹
,
Zeiser²,
Wilson³
et al. 2017
Phys. Rev. C
12
1
11
0
View full text Add to dashboard Cite

Measurement of high-energy prompt gamma-rays from neutron induced fission of U-235

Fission cross-sections, prompt fission neutron and γ-ray emission in request for nuclear applications

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Needs of Accurate Prompt and Delayed γ-spectrum and Multiplicity for Nuclear Reactor Designs

Cited by 49 publications

References 8 publications

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*Rose1, Zeiser2, Wilson3 et al. 2017Phys. Rev. C121110View full textAdd to dashboardCite

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*Rose1, Zeiser2, Wilson3 et al. 2017Phys. Rev. C121110View full textAdd to dashboardCite

Measurement of high-energy prompt gamma-rays from neutron induced fission of U-235

Fission cross-sections, prompt fission neutron and γ-ray emission in request for nuclear applications

Contact Info

Product

Resources

About

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*
Rose
¹
,
Zeiser²,
Wilson³
et al. 2017
Phys. Rev. C
12
1
11
0
View full text Add to dashboard Cite

Energy dependence of the promptγ-ray emission from the(d,p)-induced fission ofU*
Rose
¹
,
Zeiser²,
Wilson³
et al. 2017
Phys. Rev. C
12
1
11
0
View full text Add to dashboard Cite