JAEA-Conf 2011-002 - 日本原子力研究開発機構

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among these libraries, and the difference in energy-integrated capture rate among these libraries can be seen at some range. However the magnitude of the difference is also small enough not to affect remarkably on the difference in energy-integrated capture rate among these libraries. Fig. 6 Er capture rate in each nuclide at E3 core JAEA-Conf 2011-002 Fig. 7 167 Er capture cross Fig. 8 167 Er capture rate difference at E3 core (left) and EE1 core (right) There is a difference in C/E value of Ho2O3 between ENDF/B-VII.0 (~1.01) and JEFF-3.1 (~1.10) at EE1 core as shown in Fig. 2. The infinite dilution 165 Ho cross section in SRAC library 107 energy groups is shown in Fig.9. Figure 9 shows a slight difference of 165 Ho capture cross section in some energy ranges between ENDF/B-VII.0 and JEFF-3.1. Also the capture rate of 165 Ho shows the difference in some energy ranges at EE1 core as shown in Fig. 10. However the energy-integrated capture rate is almost the same between ENDF/B-VII.0 and JEFF-3.1 by the cancellation among energy groups. The difference in capture rate is about 0.8% at EE1 core, and the magnitude of the difference is not enough to explain the difference in C/E value. The cause of the C/E difference in Ho2O3 worth between ENDF/B-VII.0 and JEFF-3.1 at EE1 core could not be clarified by considering the capture rate obtained by infinite dilution cross section, and the further investigation is necessary to explain the difference in C/E value ENDF/B-VII.0 and JEFF-3.1.
Fig.9 165 Ho capture cross section Fig.10 165 Ho capture rate difference at EE1 core Analyses were performed to verify nuclear data of some rare-earth elements(Dy, Ho, Er and Tm) in the cross section libraries (JENDL-4.0, JENDL-3.3, ENDF/B-VII.0 and JEFF-3.1) by using MVP calculation. The remarkable discrepancy of C/E value from 1.0 is not obtained for all elements and cores, although there is a relatively large discrepancy in the C/E value of Ho2O3 at EE1 core between ENDF/B-VII.0 and JEFF-3.1. To be clear the discrepancy of C/E value by considering the difference in cross section among these libraries, infinite dilution cross section in SRAC library 107 energy groups are used for energy-integrated capture rate. The difference in the cross section can be seen in some energy ranges, however the difference of energy-integrated capture rate among these libraries is small within 0.1% for Dy and 0.2% for Er at both cores. The magnitude of the difference is small and is consistent to the tendency of the C/E value among libraries. The largest difference in C/E value is obtained in the case of Ho at EE1 core between ENDF/B-VII.0 and JEFF-3.1, however this difference could not be explained from the comparison of infinite dilution cross section in 107 energy-groups, therefore the further investigation is planning to be clear the cause of the difference. This work has been carried out in partly under the Visiting Researcher's Program of the Research Reactor Institute, Kyoto University. The authors are deeply grateful to the staffs of KUCA, including Dr. Tsuyoshi Misawa, Dr. Choel-Ho Pyeon, Dr. Lim Jaeyong, Mr. Hiroshi Nakamura, Mr. Hiroshi Yamamoto, Dr. Tadafumi Sano, Mr. Tomoyoshi Takeshita and Mr. Yoshiaki Tanaka for their generous help and cooperation during the experiments. JAEA-Conf 2011-002 [1] K.Shimozato, K.Ieyama, T.Kitada et al., “Measurements and Analysis of Reactivity Worth of Rare-Earth Elements at Kyoto University Critical Assembly,” Proc. Int. Conf. on the Physics of Reactors (PHYSOR2010), May 9-14, 2010, Pittsburgh, Pennsylvania, USA.
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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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JAEA-Conf 2011-002 equilibrium emis
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JAEA-Conf 2011-002 Cowley et al. [1
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4. Conclusions We have compared nuc
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of MeV region with highest cosmic-r
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JAEA-Conf 2011-002 events can be id
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JAEA-Conf 2011-002 models and its p
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JAEA-Conf 2011-002 xx
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JAEA-Conf 2011-002 1. The recent ac
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JAEA-Conf 2011-002 4. Conceptual de
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The Institute's staff of about 280
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3. Nuclear Theory Laboratory JAEA-C
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JAEA-Conf 2011-002 References [1] P
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JAEA-Conf 2011-002 reaction 6 Li +
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Using the approximated distribution
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momentum of the constituents of P.
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dσ/dΩ (mb/sr) c.m. scattering ang
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JAEA-Conf 2011-002 [2] N. Austern,
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moderating fast neutrons emitted fr
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JAEA-Conf 2011-002 3. Results and d
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JAEA-Conf 2011-002 the detection de
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Fig.1. Experimental arrangement for
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in this work was confirmed. (2) 153
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Neutron Capture Cross Section of 15
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ENDF resonance parameters are based
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sample changer. The measured flux s
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REFERENCES JAEA-Conf 2011-002 [1] W
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JAEA-Conf 2011-002 Fig. 4: The rela
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Fig. 10: The PHITS2 calculation geo
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for such a low energy region should
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MCNPX calculation was performed bas
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JAEA-Conf 2011-002 We measured dou
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1mm-thick carbon target 22mm in dia
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JAEA-Conf 2011-002 Figure 2 shows e
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The double-differential (n,xp) and
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JAEA-Conf 2011-002 forward angles.
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Fig.3. Two-dimensional plot of PI v
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JAEA-Conf 2011-002 Fig. 7. Deuteron
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JAEA-Conf 2011-002 The new detector
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4. Off line data analysis Double di
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eports of data of carbon-ion incide
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Count [-] 4 10 3 10 2 10 10 1 Charg
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Acknowledgement We are grateful to
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Beam Line BM1 Copper Target BM2 5×
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φ = φbm · ρtof · ρmulti (2) E
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References [1] K. Ishibashi, H. Tak
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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 reactions. Figur
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JAEA-Conf 2011-002 Fig. 3. The angu
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