JAEA-Conf 2011-002 - 日本原子力研究開発機構

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References [1] K. Ishibashi, H. Takada, T. Nakamoto, et al., “Measurement of Neutron-Production Double- Differential Cross Sections for Nuclear Spallation Reaction Induced by 0.8, 1.5 and 3.0 GeV Protons“, J. Nucl. Sci. Technol., 34, 529-537 (1997). [2] W. B. Amian, R. C. Byrd, C. A. Goulding, et al., “Differential neutron production cross sections for 800-MeV protons“, Nucl. Sci. Eng., 112, 78 (1992). [3] S.Leray, F.Borne, S.Crespin, et al., “Spallation neutron production by 0.8, 1.2, and 1.6 GeV protons on various targets“, Phys. Rev., C65, 044621 (2002). [4] H, Nakashima, N. V. Mokhov, Y. Kasugai, et al., “JASMIN: Japanese-American Study of Muon Interactions and Neutron detection“, Proc. SATIF-10, Geneva, Switzerland, June 2-4, 2010, to be published. [5] M. Hagiwara, T. Sanami, Y. Iwamoto, et al., “Shielding experiments at high energy accelerators of Fermilab (III): neutron spectrum measurements in intense pulsed neutron fields of the 120-GeV proton facility using a current bonner sphere technique“, Proc. ISORD-5, Kitakyushu, Japan, July 15-17, 2009, to be published. [6] N. Nakaoa, S. Taniguchi, S. H. Rokui, et al., “Measurement of neutron energy spectra behind shielding of a 120 GeV/c hadron beam facility“ Nucl. Instr. and Meth. A562, 950 (2006). [7] http://www-ppd.fnal.gov/MTBF-w/ JAEA-Conf 2011-002 [8] P. W. Lisowski, A. Gavron, W. E. Parker, et al., “Fission cross sections in the intermediate energy region,“ Proc. Specialists’ Meeting on Neutron Cross Section Standards for the Energy Region above 20 MeV, Uppsala, Sweden May 21–23, 177 (1991). [9] D. Satoh, T. Sato, N. Shigyo, et al., “SCINFUL-QMD: Monte Carlo based computer code to calculate response function and detection efficiency of a liquid organic scintillator for neutron energies up to 3 GeV“, JAEA-Data/Code, 2006-023(2006).
27. Comparison of Neutron Production from Heavy-ion Reaction using PHITS and FLUKA Cheol Woo LEE, Young-Ouk LEE Korea Atomic Energy Research Institute, 1045 Daeduck-daero, Yuseong-gu, Daejeon, Korea e-mail: cwll@kaeri.re.kr In this study, heavy ion transport codes, PHITS and FLUKA were compared in the view of the radiation shielding. The neutron production rates were calculated using these two codes and the results were compared with the measurement. C-12 ion beam with the energy of 400 MeV/n and graphite target was used in the calculation of the neutron production. The angular distributions of the secondary neutrons from the thick target were compared and applied in the shielding calculations. By using these neutron source terms, the differences of the dose rate behind of the shield materials, concrete, due to the neutron spectrum was evaluated. The shielding design margin for the n-TOF experimental room using heavy ion beam in the accelerator facility in Korea was evaluated. I. Introduction With increasing multi-purpose use of high energy heavy ion accelerators, secondary particle production and transport by high-energy heavy ions are an important issue in the design of the heavy ion accelerator rooms and facility. At present, the development of a heavy ions accelerator with the acceleration energy of 400 MeV/n is under consideration in Korea. And we have a plan to build a n_TOF measurements room in the heavy ion accelerator facility. But there have been no experience to construct a heavy ion accelerator of the high energy above 100 MeV/n and perform the radiation shielding design in Korea. This study is a preliminary analysis of the simulation codes for the heavy ion transport through the benchmark calculations for the evaluation of the secondary radiation source terms and the difference of the calculation for the shielding design. II. Calculations and Results JAEA-Conf 2011-002 Heavy-ion transport codes containing an event generator and physics models to simulate the heavy-ion transport and nuclear-nuclear reactions requires following some features. - reliable description of cross-sections and particle yields from a fraction of eV to TeV for heavy-ion projectiles - leading particles (elastic, diffractive and inelastic) - evaluate nuclide inventory or residuals - simulate electromagnetic process and describe the magnetic field for charged particles There are many Monte Carlo codes satisfying these requirements like as FLUKA, PHITS, GEANT4, MARS15, MCNPX and SHIELD. Of these, FLUKA and PHITS were selected in this study considering benchmarking conditions, geometrical model, kinds of heavy ions, measurements for benchmarking, energy of particles, etc. The inelastic interaction of the incoming projectiles and the target nuclei interact leads to the production of secondary particles via different processes, such as fragmentation, fusion, Fermi break-up, and de-excitation. The produced particles are mostly protons, neutrons and light fragments. The secondary neutrons are more important in the view of the prompt radiation shielding. The production yields of the secondary neutrons, mostly differential in both, energy and angle are compared by using the three codes. These simulations can also be divided in two categories. The first one is a thin target which thickness is in the order of one interactions length. The comparisons of the results from thin target are very valuable assessing the quality of the models of a Monte Carlo particle code and
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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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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 Figure 1. An exa
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JAEA-Conf 2011-002 calculation of d
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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 1. The recent ac
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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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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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0.010% 0.000% -0.010% -0.020% -0.03
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To clarify what nuclides and reacti
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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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