| Project/Area Number |
14550054
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied physics, general
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| Research Institution | The High Energy Accelerator Research Organization |
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Principal Investigator |
NAKAO Noriaki High Energy Accelerator Research Organization, Radiation Science Center, Research Associate, 放射線科学センター, 助手 (80272524)
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| Co-Investigator(Kenkyū-buntansha) |
BAN Syuichi High Energy Accelerator Research Organization, Radiation Science Center, Professor, 放射線科学センター, 教授 (70141976)
MIURA Taichi High Energy Accelerator Research Organization, Radiation Science Center, Assistant Professor, 放射線科学センター, 助教授 (80209717)
NUMAJIRI Masaharu High Energy Accelerator Research Organization, Radiation Science Center, Research Associate, 放射線科学センター, 助手 (20189385)
KAWAI Masayoshi High Energy Accelerator Research Organization, Institute of Materials Structure Science, Professor, 物質構造科学研究所, 教授 (10311127)
SANAMI Toshiya High Energy Accelerator Research Organization, Radiation Science Center, Research Associate, 放射線科学センター, 助手 (90321538)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2003: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2002: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | spallation neutron / concrete shield / neutron field / activation detector / shielding experiment / deep penetration / Monte Carlo / モンテカルロ / 減弱距離 |
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| Research Abstract |
An irradiation room for a high-energy neutron field was arranged at the KENS spallation neutron source facility for studies of shielding, activation and radiation damage of materials. In this room, a high-energy neutron source produced in the forward direction from a thick tungsten target bombarded by 500-MeV protons is available. An ordinary concrete shield of 4-m-thickness was newly assembled in the room in contact with the beam exit located 2.5-m downstream from the target center. Activation detectors of bismuth, aluminum, indium and gold foils were inserted into 8 slots inside the shield, and attenuations of neutron reaction rates were obtained by measurements of □-rays from the activation detectors.
A Monte-Carlo simulation using the MARS 14 code was also performed, and comparisons between the calculations and measurements show good agreements within a factor of 2. This experimental data will be useful as benchmark data to check the accuracies of the transmission calculation codes and shielding parameters for deep penetration.
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