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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
2007
发表期刊NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
卷号259期号:1页码:702-707
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
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.
关键词accelerator concrete activation Cl-36 AMS thermal neutron fluence
学科领域Instruments & Instrumentation; Nuclear Science & Technology; Physics
DOI10.1016/j.nimb.2007.01.208
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语种英语
WOS研究方向Instruments & Instrumentation ; Nuclear Science & Technology ; Physics
WOS类目Instruments & Instrumentation ; Nuclear Science & Technology ; Physics, Atomic, Molecular & Chemical ; Physics, Nuclear
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
专题加速器中心
作者单位中国科学院高能物理研究所
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GB/T 7714
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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