New prompt spectral<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>γ</mml:mi></mml:math>-ray data from the reaction<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>252</mml:mn></mml:msup></mml:math>Cf(sf) and its implication on present evaluated nuclear data files

Billnert, R.; Hambsch, F.‐J.; Oberstedt, Andreas; Oberstedt, S.

doi:10.1103/physrevc.87.024601

Cited by 89 publications

(124 citation statements)

References 25 publications

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“…The comparison with other measurements and evaluations also is given in Table 1. Our measured ¢M J ²'s for all isotopes studied are consistently higher than the weighted-average of earlier measurements [23] by ~ 10% except for the most recent measurements [1,6,7], where their measured ¢M J ² is ~ 11% greater than ours for 235 U but near in agreement with ours for both 241 Pu and 252 Cf. Moreover, ours are consistent with the evaluated data listed in ENDF/B-VII.1 [24].…”

Section: Experiments and Data Analysissupporting

confidence: 75%

“…The same comparisons are also made for the neutron-induced fission in 239,241 Pu and the spontaneous fission in 252 Cf. Our measured ¢E J,tot ² are consistently higher than the previous ones [1,6,7,23] by ~ 20% for all isotopes…”

Section: Given Inmentioning

confidence: 53%

“…The heating in nuclear reactors attributed to the total J-ray emission in fission is underestimated up to 28% using the evaluated data for the main reaction channels, 235 U(n,f) and 239 Pu(n,f) [1]. This discrepancy is significantly greater than 7.5%, an upper bound of the uncertainty deemed necessary to adequately model the heat deposit in the fuel core [2,3].…”

Section: Introductionmentioning

confidence: 93%

“…The majority of measurements made for the prompt J-ray emission in fission always employed a single or a few J-ray detectors. For example, a single NaI detector was used by Verbinski et al [5] more than 40 years ago and the cerium-doped LaBr 3 , CeBr 3 , and LaBr 3 detectors were used recently by Billnert et al [1] and Oberstedt et al [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Total promptγ-ray emission in fission

Chyzh

Kwan

et al. 2016

EPJ Web of Conferences

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Abstract. The total prompt J-ray energy distributions for the neutron-induced fission of 235 U, 239,241 Pu at incident neutron energy of 0.025 eV -100 keV, and the spontaneous fission of 252 Cf were measured using the Detector for Advanced Neutron Capture Experiments (DANCE) array in coincidence with the detection of fission fragments by a parallel-plate avalanche counter. DANCE is a highly segmented, highly efficient 4S J-ray calorimeter. Corrections were made to the measured distribution by unfolding the two-dimension spectrum of total J-ray energy vs multiplicity using a simulated DANCE response matrix. The mean values of the total prompt Jray energy, determined from the unfolded distributions, are ~ 20% higher than those derived from measurements using single J-ray detector for all the fissile nuclei studied. This raises serious concern on the validity of the mean total prompt J-ray energy obtained from the product of mean values for both prompt J-ray energy and multiplicity.

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Section: Experiments and Data Analysissupporting

confidence: 75%

Section: Given Inmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Total promptγ-ray emission in fission

Chyzh

Kwan

et al. 2016

EPJ Web of Conferences

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“…Table 1. Comparison between experimental data citeVerbinski [12] and FIFRELIN calculations obtained with Billnert experimental parameters (E threshold γ = 110 keV; T coinc = 3 ns). In Verbinski experiment, parameters were E threshold γ = 140 keV and T coinc = 10 ns, leading to a lower multiplicityM γ and a higher average energy per quantum < γ >.…”

Section: Impact Of Spin Cut-off Models On Fission Observablesmentioning

confidence: 99%

Sensitivity studies of spin cut-off models on fission fragment observables

Thulliez

Litaize

Sérot

2016

EPJ Web of Conferences

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Abstract. A fission fragment de-excitation code, FIFRELIN, is being developed at CEA Cadarache. It allows probing the characteristics of the prompt emitted particles, neutrons and gammas, during the de-excitation process of fully accelerated fission fragments. The knowledge of the initial states of the fragments is important to accurately reproduce the fission fragment observables. In this paper a sensitivity study of various spin cut-off models, completely defining the initial fission fragment angular momentum distribution has been performed. This study shows that the choice of the model has a significant impact on gamma observables such as spectrum and multiplicity and almost none on the neutron observables.

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Assessment of the influence of the RaD-X balloon payload on the onboard radiation detectors

et al. 2016

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The NASA Radiation Dosimetry Experiment (RaD‐X) stratospheric balloon flight mission, launched on 25 September 2015, provided dosimetric measurements above the Pfotzer maximum. The goal of taking these measurements is to improve aviation radiation models by providing a characterization of cosmic ray primaries, which are the source of radiation exposure at aviation altitudes. The RaD‐X science payload consists of four instruments. The main science instrument is a tissue‐equivalent proportional counter (TEPC). The other instruments consisted of three solid state silicon dosimeters: Liulin, Teledyne total ionizing dose (TID) and RaySure detectors. The instruments were housed in an aluminum structure protected by a foam cover. The structure partially shielded the detectors from cosmic rays but also created secondary particles, modifying the ambient radiation environment observed by the instruments. Therefore, it is necessary to account for the influence of the payload structure on the measured doses. In this paper, we present the results of modeling the effect of the balloon payload on the radiation detector measurements using a Geant‐4 (GEometry ANd Tracking) application. Payload structure correction factors derived for the TEPC, Liulin, and TID instruments are provided as a function of altitude. Overall, the payload corrections are no more than a 7% effect on the radiation environment measurements.

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New prompt spectralγ-ray data from the reaction252Cf(sf) and its implication on present evaluated nuclear data files

Cited by 89 publications

References 25 publications

Total promptγ-ray emission in fission

Total promptγ-ray emission in fission

Sensitivity studies of spin cut-off models on fission fragment observables

Assessment of the influence of the RaD-X balloon payload on the onboard radiation detectors

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