JAEA-Conf 2011-002 - 日本原子力研究開発機構

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in this work was confirmed. (2) 153 Eu The preliminary neutron capture cross sections of 153 Eu were obtained in the neutron energy region from 0.03 eV to 4 keV as shown in Fig. 5. Widder measured the capture cross sections in the region from 0.01 to 10 eV, using a reactor with a fast chopper [6]. The results of Widder are larger than the present results by about 20 % in the thermal energy region. On the other hand, the evaluated values of JENDL-4.0 show good agreement with the present ones below 1 eV. In the energy range from 100 eV to 4 keV, the present data agree well with the experimental data by Konks et al.[7] and Moxon et al.[8], while the discrepancy between the evaluated values of JENDL-4.0 and the present results ranges from 5 to 40 %. An undesirable structure is clearly observed around 0.6 eV. There is a possibility that the correction for 151 Eu as an isotopic impurity was not completely made. 5. Conclusion The preliminary neutron capture cross sections of 151 Eu and 153 Eu have been measured from 0.03 eV to the keV region with a pair of C6D6 detectors by the TOF method. As for 151 Eu, the present data agree well with the previous experimental data and the evaluated values of JENDL-4.0. Therefore, the validity of the weighting function derived in this work was confirmed. As for 153 Eu, the results of Widder are larger than the presents by about 20 % at the thermal energy. The evaluated values of JENDL-4.0 are in good agreement with the present ones except the energy region from 100 eV to 4 keV. Acknowledgement The authors would like to express their thanks to the linac staff of the KURRI for making it possible to operate the accelerator steadily. They would also like to express their thanks to Dr. Takumi Kubota for cooperation on calculation with the EGS5, and to Prof. Samyol Lee and Mr. Naoya Abe for their helpful discussions. Counts / 25keV / γ-ray JAEA-Conf 2011-002 γ-ray Energy (MeV) Fig. 2. Simulated response function of a pair of C6D6 liquid scintillators
W(I) Neutron Capture Cross Section of 151 Eu (barns) Weighting Weight Function γ-ray Energy (MeV) Fig. 3. Weighting function W(I) of a pair of C6D6 liquid scintillators JAEA-Conf 2011-002 Neutron Energy (eV) Fig. 4. Neutron capture cross sections of 151 Eu JENDL-4.0 (2010) F.Widder (1975) V.A.Konks (1964,1968) M.C.Moxon (1976) J.B.Czirr (1970) M.Mizumoto (1979) Present
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JAEA-Conf 2011-002 Proceedings of t
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JAEA-Conf 2011-002 31. Preliminary
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6.2 Measurement of neutron-induced
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JAEA-Conf 2011-002 Table 1 Comparis
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JAEA-Conf 2011-002 (T1/2=8,900,000
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JAEA-Conf 2011-002 Though words too
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JENDL-3.3 showed better applicabili
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ENDF. Thus this cross section store
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Acknowledgement JAEA-Conf 2011-002
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In the MALIBU program, isotope conc
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some minor actinides. For major act
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JAEA-Conf 2011-002 code MVP-BURN an
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JAEA-Conf 2011-002 [3] Measurements
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3.1 Experimental Set up JAEA-Conf 2
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References JAEA-Conf 2011-002 [1] N
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JAEA-Conf 2011-002 was large. The a
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JAEA-Conf 2011-002 4. Results and D
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Acknowledgments Present study inclu
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Fig. 1 A conceptural picture of the
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4. Theoretical studies Theoretical
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JAEA-Conf 2011-002 Fig.9 Comparison
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Ion source JAEA-Conf 2011-002 LE
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JAEA-Conf 2011-002 3. Readiness
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JAEA-Conf 2011-002
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JAEA-Conf 2011-002 Figure 1. An exa
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JAEA-Conf 2011-002 Figure 6. Compar
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JAEA-Conf 2011-002 calculation of d
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Page 88 and 89: The Institute's staff of about 280
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Page 148 and 149: JAEA-Conf 2011-002 The new detector
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Page 156 and 157: Acknowledgement We are grateful to
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JAEA-Conf 2011-002 hint at the orig
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Neutron Dose Rate [Sv/hr/src neutro
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JAEA-Conf 2011-002 radiation protec
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Ztarget, Atarget are the numbers fo
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We described our formalism for calc
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2. Model
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JAEA-Conf 2011-002
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JAEA-Conf 2011-002
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JAEA-Conf 2011-002 reactions. Figur
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JAEA-Conf 2011-002 Fig. 3. The angu
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JAEA-Conf 2011-002
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JAEA-Conf 2011-002
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analysis of integral experiments [6
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A modified SRAC library was prepare
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JAEA-Conf 2011-002 approximately 0.
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JAEA-Conf 2011-002 constructing the
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Fig.9 Spectrum of gamma-ray followi
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JAEA-Conf 2011-002 in the same way
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JAEA-Conf 2011-002 [7]. For example
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JAEA-Conf 2011-002 For
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JAEA-Conf 2011-002
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JAEA-Conf 2011-002 (5.0-9.0MeV), a
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components, the 0.56Wt% for hydroge
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Sensitivities of curium isotope con
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decreases of (n,g) reaction rates,
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5. Conclusion JAEA-Conf 2011-002 Wi
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2. Foundation of sensitivity analys
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JAEA-Conf 2011-002 where f g and f
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Fig.1 Sensitivity coefficient of th
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An outline of core configurations o
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0.010% 0.000% -0.010% -0.020% -0.03
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To clarify what nuclides and reacti
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Calculation was performed by the MV
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among these libraries, and the diff
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JAEA-Conf 2011-002 - 日本原子力研究開発機構

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