Estimation of thermal neutron fluences in the concrete of proton accelerator facilities from Cl-36 production
Bessho, K; Matsumura, H; Miura, T; Wang, Q; Masumoto, K; Hagura, H; Nagashima, Y; Seki, R; Takahashi, T; Sasa, K; Sueki, K; Matsuhiro, T; Tosaki, Y
刊名NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
2007
卷号259期号:1页码:702-707
关键词accelerator concrete activation Cl-36 AMS thermal neutron fluence
学科分类Instruments & Instrumentation; Nuclear Science & Technology; Physics
DOI10.1016/j.nimb.2007.01.208
通讯作者High Energy Accelerator Res Org, Radiat Sci Ctr, Tsukuba, Ibaraki 3050801, Japan ; Univ Tsukuba, Tandem Accelerator Complex, AMS Grp, Tsukuba, Ibaraki 3058577, Japan ; Inst High Energy Phys, Radiat Protect Grp, Beijing 100049, Peoples R China
文章类型Article; Proceedings Paper
英文摘要The thermal neutron fluence that poured into the shielding concrete of proton accelerator facilities was estimated from the in situ production of Cl-31. The thermal neutron fluences at concrete surfaces during 10-30 years of operation were in the range of 10(12)- 1014 n/cm(2). The maxima in thermal neutron fluences were observed at approximate to 5-15 cm in the depths analyzed for Cl-36/Cl-35 by AMS. These characteristics imply that thermalization of neutrons occurred inside the concrete. Compared to the several tens of MeV cyclotrons, secondary neutrons penetrate deeper into the concrete at the high-energy accelerators possessing acceleration energies of 400 MeV and 12 GeV. The attenuation length of neutrons reflects the energy spectra of secondary neutrons emitted by the nuclear reaction at the beam-loss points. Increasing the energy of secondary neutrons shifts the maximum in the thermal neutron fluences to deeper positions. The data obtained in this study will be useful for the radioactive waste management at accelerator facilities. (c) 2007 Elsevier B.V. All rights reserved.
类目[WOS]Instruments & Instrumentation ; Nuclear Science & Technology ; Physics, Atomic, Molecular & Chemical ; Physics, Nuclear
研究领域[WOS]Instruments & Instrumentation ; Nuclear Science & Technology ; Physics
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语种英语
WOS记录号WOS:000247535600125
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被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/238308
专题中国科学院高能物理研究所_加速器中心_期刊论文
作者单位中国科学院高能物理研究所
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Bessho, K,Matsumura, H,Miura, T,et al. Estimation of thermal neutron fluences in the concrete of proton accelerator facilities from Cl-36 production[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,2007,259(1):702-707.
APA Bessho, K.,Matsumura, H.,Miura, T.,Wang, Q.,Masumoto, K.,...&Tosaki, Y.(2007).Estimation of thermal neutron fluences in the concrete of proton accelerator facilities from Cl-36 production.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,259(1),702-707.
MLA Bessho, K,et al."Estimation of thermal neutron fluences in the concrete of proton accelerator facilities from Cl-36 production".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 259.1(2007):702-707.
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