Recent advances in the JENDL project

Shibata, Kozo; Nakagawa, Tsuneo; Fukahori, Tokio; Iwamoto, Osamu; Ichihara, Akira; Iwamoto, Nobuyuki; Kunieda, Satoshi; Otuka, Naohiko; Katakura, J.; Watanabe, Yukinobu; Kosako, Kazuaki

doi:10.1051/ndata:07743

Cited by 9 publications

(10 citation statements)

References 12 publications

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“…8. The energy of the particle corresponds to an excited state of 17 O at approximately 2 MeV, but it is not likely to be a real new excited state in 17 O, because there is no corresponding state in the mirror nucleus 17 F. 15) It is still unclear what kind of mechanism contributes to the formation of this peak. …”

Section: Double-differential Cross Sectionmentioning

confidence: 99%

Measurement of Charged-Particle Emission Double-Differential Cross Section of Fluorine for 14.2MeV Neutrons

Kondo

Murata

Ochiai

et al. 2011

Journal of Nuclear Science and Technology

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We carried out detailed measurement of the double-differential cross sections of fluorine for the emissions of protons, deuterons, tritons, and -particles with 14.2 MeV incident neutrons. An improved charged-particle spectrometer with a pencil DT-neutron beam furnished at the FNS facility of the Japan Atomic Energy Agency enabled us to obtain precise data with a fine energy resolution over a wide energy range and an angular range from 15 to 150 . The present experiment is the first simultaneous measurement of the four different kinds of charged particles and provides useful data to establish a nuclear reaction model of fluorine as well as to confirm previous experimental data. Angular-differential cross sections for several discrete peaks corresponding to excited states of residual nuclei were extracted to discuss the reaction mechanism of charged-particle emission. The obtained data suggest that the charged-particle emission reaction of fluorine has a complicated mechanism in which there are contributions from the direct reaction, pre-equilibrium, and equilibrium processes. The obtained data were compared with the nuclear data evaluated in JENDL-3.3 and ENDF/B-VII.0. The results show large differences in the energy and angular distributions of emitted particles and the charged-particle production cross sections between the measured and evaluated data.

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Section: Double-differential Cross Sectionmentioning

confidence: 99%

Measurement of Charged-Particle Emission Double-Differential Cross Section of Fluorine for 14.2MeV Neutrons

Kondo

Murata

Ochiai

et al. 2011

Journal of Nuclear Science and Technology

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“…From the view of radiation protection, dose calculations for activated concrete shown in Tables 5-8 were carried out by PHITS code Ver.2.88 (14) . Nuclear data was used JENDL-4 (15) . Calculation model was assumed as shown in Figure 6.…”

Section: Resultsmentioning

confidence: 99%

Activation experiment for concrete blocks using thermal neutrons

Okuno¹,

Tanaka²

2017

EPJ Web Conf.

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Abstract. Activation experiments for ordinary concrete, colemanite-peridotite concrete, B4C-loaded concrete, and limestone concrete are carried out using thermal neutrons. The results reveal that the effective dose for gamma rays from activated nuclides of colemanite-peridotite concrete is lower than that for the other types of concrete. Therefore, colemanite-peridotite concrete is useful for reducing radiation exposure for workers.

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“…The thermal neutron distribution on the floor level of the LHD torus hall measured by In foils is shown in Fig. 4 [16]. In this figure, the thermal neutron flux, εth, is defined as the local thermal neutron flux for single neutron source.…”

Section: Neutron Flux Distributionmentioning

confidence: 99%

Neutron flux distributions in the Large Helical Device torus hall evaluated by an imaging plate technique in the first campaign of the deuterium plasma experiment

et al. 2019

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The global flux distributions for thermal, epi-thermal and fast neutrons in the torus hall of large fusion devices were experimentally evaluated for the first time in the Large Helical Device (LHD) using the activation foil method measured by the imaging plate (IP) and High-purity Germanium detector (HPGe). It turned out that the thermal neutron was effectively absorbed by borated polyethylene blocks placed beneath the LHD. This should reduce the radioactivity of the floor and is beneficial to maintain good environment for radiation workers. The uniform distributions of epi-thermal neutron and fast neutrons were observed near LHD. In particular, the significant decrease of fast neutron flux with increasing the distance from LHD due to quick energy loss of fast neutron was observed.The neutron flux distribution measurement with rough energy discrimination based on the threshold energy of neutron activation foil allows us to estimate the spatial radiation dose rate as well as the radioactivity in components in the torus hall. The prediction of the radioactivity in the concrete floor indicated that radioactive isotope, 55 Fe will be a dominant source of radioactivity in the concrete after nine-years deuterium experiment campaign finished.

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Recent advances in the JENDL project

Cited by 9 publications

References 12 publications

Measurement of Charged-Particle Emission Double-Differential Cross Section of Fluorine for 14.2MeV Neutrons

Measurement of Charged-Particle Emission Double-Differential Cross Section of Fluorine for 14.2MeV Neutrons

Activation experiment for concrete blocks using thermal neutrons

Neutron flux distributions in the Large Helical Device torus hall evaluated by an imaging plate technique in the first campaign of the deuterium plasma experiment

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