Sequential Measurements of Cosmic-Ray Neutron Spectrum and Dose Rate at Sea Level in Sendai, Japan
スポンサーリンク
概要
- 論文の詳細を見る
The cosmic-ray neutron energy spectrum and dose rate were measured sequentially for two years from April 2001 up to March 2003 by using three neutron detectors, a 3He-loaded multi-moderator detector (Bonner ball), 12.7 cm diameter by 12.7 cm long NE213 organic liquid scintillator, and high-sensitivity rem (dose equivalent) counter at the Kawauchi campus of Tohoku University in Sendai, Japan of geomagnetic latitude, 29°N, and cutoff rigidity, 10.43 GV.The neutron spectrum has three major peaks, thermal energy peak, evaporation peak around 1 MeV and cascade peak around 100 MeV. The ambient neutron dose equivalent rates measured by the rem counter, and the Bonner ball keep almost constant values of 4.0 and 6.5 (nSv/h), respectively, throughout this time period, after atmospheric pressure correction, and it often decreased about 30% after a large Solar Flare, that is called as the Forbush decrease. The total neutron flux was also obtained by the Bonner ball measurements to be 7.5×10−3 (n cm−2·s−1) in average. The altitude variation of neutron flux and dose was also investigated by comparing the measured results with other results measured at Mt. Fuji area and aboard an airplane, where the cutoff rigidities are similar.
- 一般社団法人 日本原子力学会の論文
- 2005-10-25
著者
-
NAKAMURA Takashi
Cyclotron Radioisotope Center, Tohoku University
-
中村 高遠
静大院理工
-
Nakamura Takatou
Department Of Electronics Faculty Of Engineering Shizuoka University
-
Nakamura T
Hokkaido Univ. Sapporo
-
Suzuki H
Tohoku Univ. Miyagi Jpn
-
Suzuki Hiroyuki
Neutron Device Engineering Department Of Quantum Science And Energy Engineering Tohoku University
-
Nunomiya Tomoya
Neutron Device Engineering Department Of Quantum Science And Energy Engineering Tohoku University
-
Abe Shigeru
Cyclotron And Radioisotope Center Tohoku University
-
NUNOMIYA Tomoya
Cyclotron and Radioisotope Center, Tohoku University
-
TERUNUMA Kazutaka
Cyclotron and Radioisotope Center, Tohoku University
-
SUZUKI Hiroyuki
Cyclotron and Radioisotope Center, Tohoku University
-
Nakamura Takashi
Cyclotron And Radioisotope Center Tohoku University
-
Terunuma Kazutaka
Cyclotron And Radioisotope Center Tohoku University
関連論文
- 23pRS-2 高速点火用コーン付きシェルターゲットの爆縮(核融合プラズマ(慣性閉じ込め),領域2,プラズマ基礎・プラズマ科学・核談合プラズマ・プラズマ宇宙物理)
- 24aRS-10 超高強度レーザー生成プラズマからの放射X線の偏光度分布と高速電子輸送(核融合プラズマ(慣性閉じ込め),領域2,プラズマ基礎・プラズマ科学・核談合プラズマ・プラズマ宇宙物理)
- 24aRS-11 X線偏光分光計測による超高強度レーザー生成高速電子輸送のレーザー偏光依存性の観測(核融合プラズマ(慣性閉じ込め),領域2,プラズマ基礎・プラズマ科学・核談合プラズマ・プラズマ宇宙物理)
- 24aRS-12 偏光X線分光法による衝突輻射モデルと電子衝突磁気副準位別断面積の理論的研究(核融合プラズマ(慣性閉じ込め),領域2,プラズマ基礎・プラズマ科学・核談合プラズマ・プラズマ宇宙物理)
- Electron transport in a gold nanoparticle assembly structure stabilized by a physisorbed porphyrin derivative
- Measurements of(n, xp), (n, xd)Double Differential Cross Sections of Carbon and Aluminum for 65 and 75 MeV Neutrons
- Measurement of Gamma-Ray Production Double-Differential Cross Sections for the Spallation Reaction Induced by 0. 8, 1. 5 and 3. 0 GeV Protons
- Measurement of Neutron-Production Double-Differential Cross Sections for Nuclear Spallation Reaction Induced by 0. 8, 1. 5 and 3. 0 GeV Protons
- Si基板上ZnSエピタキシャル薄膜のZnOへの酸化過程
- Si基板上ZnSエピタキシャル薄膜のZnOへの酸化過程(発光型・非発光型ディスプレイ合同研究会)
- 20pZB-3 高速点火の先進ターゲットによる非球対称爆縮の設計(20pZB 慣性核融合(高速点火),チュートリアル講演,領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))
- 23pRE-8 レーザー照射によるガス密度プラズマ中での磁気渦形成(プラズマ基礎(高エネルギー密度プラズマ),領域2,プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理)
- 24pQE-5 FIREX-Iにおけるコア加熱特性 : コーンチップの影響(慣性核融合(ハイドロ・診断・高速点火),領域2,プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理)
- 24pQE-10 高速点火における高速電子ビームの生成制御(慣性核融合(ハイドロ・診断・高速点火),領域2,プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理)
- 22aTA-6 超高強度レーザー照射によるシース場の表面移動とプロトン加速(高エネルギー密度プラズマ物理,22aTA 領域2,ビーム物理領域合同セッション,ビーム物理領域)
- 24aRS-4 非球対称爆縮コアの挙動特性に関する数値解析(核融合プラズマ(慣性閉じ込め),領域2,プラズマ基礎・プラズマ科学・核談合プラズマ・プラズマ宇宙物理)
- ハライドVPEによる紫外発光ZnO薄膜の作製
- ハライドVPEによる紫外発光ZnO薄膜の作製
- Si基板上ZnSエピタキシャル薄膜のZnOへの酸化過程
- 24aRS-5 固体ターゲット中の高速電子輸送に対する統合シミュレーション解析(核融合プラズマ(慣性閉じ込め),領域2,プラズマ基礎・プラズマ科学・核談合プラズマ・プラズマ宇宙物理)
- Measurement for the Dose-rates of the Cosmic-ray Components on the Ground
- 電気化学析出法による非晶質酸化ビスマス薄膜の作製
- AP-HCVD法により作製したσ-Bi_2O_3薄膜へのガス供給の影響と表面モフォロジー
- 17aD01 大気圧ハライド気相成長法によるYSZ(111)基板上へのδ-Bi_2O_3薄膜の作製(結晶成長基礎(1),第35回結晶成長国内会議)
- 大気圧ハライド気相成長法によるδ-Bi2O3薄膜の作製と薄膜構造評価用X線回折装置による結晶性評価
- 薄膜化プロセスにより実現した室温で安定な螢石型酸化ビスマスの作製
- オプトアジレント機能を有する金属窒化物薄膜の創製--金属窒化物薄膜の不思議な機能
- ユーロピウムをドープした青色および緑色発光アルミン酸塩のEPR評価
- ユーロピウムをドープした青色および緑色発光アルミン酸塩のEPR評価
- 低電圧駆動ディスプレイ用微粒子蛍光体の合成
- 中速電子線励起における導電性被覆蛍光体の寿命特性
- 低電圧駆動ディスプレイ用微粒子蛍光体の合成
- 中速電子線励起における導電性被覆蛍光体の寿命特性
- SrTiO_3:Pr, Al赤色蛍光体のCL特性に対するAl添加効果
- SrTiO_3:Pr, Al赤色蛍光体のCL特性に対するAl添加効果
- ゾル-ゲル法により導電処理した蛍光体の低速電子線励起発光特性
- 1G21 水ガラスを出発原料に用いたシリカ粒子の生成機構
- Preparation of aluminum oxide films at low temperatures by a hot wall technique
- 常磁性共鳴における新しい展開
- 2H04 ゾルゲル法による蛍光体粒子へのチタン酸鉛薄膜の低温被服
- Dependence of Cathodoluminescent and Electrical Properties of Phosphors with Conducting Layer by Sol-Gel Method on Layer Thickness
- Improvement of Low Voltage Cathodoluminescent Properties of Zinc Sulfide Phosphors by Sol-Gel Method
- Red Electroluminescent Devices Using Mn-Doped CdS(Se)- and CdTe-ZnS Superlattices
- ZnS:Mn Electroluminescent Films Prepared by Hot Wall Technique
- Charge Ordering in α-(BEDT-TTF)_2I_3 by Synchrotron X-ray Diffraction(Condensed matter : electronic structure and electrical, magnetic, and optical properties)
- 希土類付活SrGa_2S_4蛍光体薄膜の発光特性
- 18-1 低速電子線励起時における蛍光体表面の電位変化
- 14)蛍光体へ被覆した導電層の膜厚と低速電子線励起発光に関する考察(情報ディスプレイ研究会)
- 蛍光体表面の改質による低速電子励起発光特性の向上
- 蛍光体へ被覆した導電層の膜厚と低速電子線励起発光に関する考察
- 蛍光体へ被覆した導電層の膜厚と低速電子線励起発光に関する考察
- 遷移金属付活Ga_2O_3薄膜の製法と構造及び発光特性
- 遷移金属付活Ga_2O_3薄膜の製法と構造及び発光特性
- 21aTB-1 シリカエアロゲルターゲットを用いた超高強度レーザーによる高速イオンの発生(プラズマ科学(高エネルギー密度プラズマ,液中プラズマ),領域2,プラズマ基礎・プラズマ科学・核談合プラズマ・プラズマ宇宙物理)
- Contact Structure for a Superconducting Field Effect Transistor Using SrTiO_3/YBa_2Cu_3O_ Films
- 常磁性共鳴によるII-VI化合物薄膜および超格子材料の局所歪
- Eu付活アルミン酸ストロンチウム蛍光体の残光特性に及ぼす共付活希土類イオンの影響
- Does the Macrostructure of Deoxyribonucleic Acid Molecules Adsorbed on Substrates by the Pulse Injection Method Reflect That in Solution?
- Real Space Observation of Double-Helix DNA Structure Using a Low Temperature Scanning Tunneling Microscopy
- Reaction Mechanism of Alkoxy Derivatives of Titanium Diketonates as Source Molecules in Liquid Source Metalorganic Chemical Vapor Deposition of (Ba,Sr)TiO_3 Films : A Study by In Situ Infrared Absorption Spectroscopy
- Effects of O_2 Gas on Reaction Mechanisms in the Chemical Vapor Deposition of (Ba, Sr)TiO_3 Thin Film
- Film Precursor Formation in Metalorganic Chemical Vapor Deposition of Barium Strontium Titanate Films : A Study by Microdischarge Optical Emission Spectroscopy
- Formation Mechanism of Strontium and Titaniuln Oxide Fillns by Metalorganlc Chemlcal Vapor Deposition: An Isotopic Labeling Study Using ^O_2 : Atoms, Molecules, and Chemical Physics
- Diagnosis of Oxidation Reactions in Metalorganic Chemical Vapor Deposition of (Ba,Sr)TiO_3 Films by In Situ Fourier Transform Infrared Spectroscopy
- Effects of Gas-Phase Thermal Decompositions of Chemical Vapor Deposition Source Molecules on the Deposition of(Ba, Sr)TiO_3 Films : A Study by In Situ Fourier Transform Infared Spectroscopy
- Gas Phase Reactions in the MOCVD of (Ba, Sr)TiO_3 Films : A Study by Microdischarge Optical Emission Spectroscopy
- Microdischarge Optical Emission Spectroscopy as a Novel Diagnostic Tool for Metalorganic Chemical Vapor Deposition of(Ba, Sr)TiO_3 Films
- Performance study of a miniature gamma ray scintillation vivo probe for tumor localization
- Spallation Neutron Measurement by the Time-of-Flight Method with a Short Flight Path
- Measurements of Secondary Neutrons Produced from Thick Targets Bombarded by High Energy Neon Ions
- Measurements of Activation Cross Sections on Spallation Reactions for ^Co and ^Cu at Incident Neutron Energies of 40 to 120 MeV
- Measurements and Calculations of Neutron Energy Spectra Behind Polyethylene Shields Bombarded by 40- and 65-MeV Quasi-Monoenergetic Neutron Sources
- Properties of Ferroelectric Memory FET Using Sr_2(Ta,Nb)_2O_7 Thin Film
- Application of Sr_2Nb_2O_7 Family Ferroelectric Films for Ferroelectric Memory Field Effect Transistor
- Study of Ferroelectric Materials for Ferroelectric Memory FET(Special Issue on Advanced Memory Devices Using High-ε and Ferroelectric Films)
- Properties of Ferroelectric Memory with Ir System Materials as Electrodes(Special Issue on Advanced Memory Devices Using High-ε and Ferroelectric Films)
- Fabrication Technology of Ferroelectric Memories
- Langmuir Layers and Langmuir-Blodgett Films of Bis-tetrathiafulvalene Annelated Macrocycle
- Tuning of Intramolecular π-π Overlap Mode of Tetrathiafulvalene Bisannulated Macrocycles in the Open-Shell Electronic State
- Langmuir-Blodgett Films of Charge-Transfer Complexes : Ethylenedithio-Substituted Amphiphilic Bis-TTF Macrocycle and F_4TCNQ or Br_2TCNQ
- Photodissociation of CaOH〔+〕 for Regeneration of Ca〔+〕 in Linear Paul Trap
- Space-Charge Shift in Motional Resonance of Ca〔+〕 Induced by Simultaneously Trapped Molecular Ions in Linear Paul Trap
- MEASUREMENT OF REACTION RATE COEFFICIENT OF LASER-EXCITED Ca^+ IONS WITH H_2O MOLECULES IN AN ION TRAP
- Laser-Microwave Double-Resonance Spectroscopy of Laser-Cooled ^9Be^+ Ions in a Weak Magnetic Field for Studying Unstable Be Isotopes
- Conducting Langmuir-Blodgett Films of Bis[bis(methylthio)tetrathiafulvalenedithiolate]-gold Complex
- Temperature dependence of band gap energies of GaAsN alloys
- Organic nanodots of a cation radical salt of amphiphilic bis-TTF annulated macrocycle
- Extension of Spallation-Based BNCT Concept to Medium- to High-Energy Accelerators
- Influences of Neutron Source Spectrum and Thermal Neutron Scattering Law Data on the MCNPX Simulation of a Cyclotron-Based Neutron Field for Boron Neutron Capture Therapy
- Engineering Design of a Spallation Reaction-Based Neutron Generator for Boron Neutron Capture Therapy
- Dielectric Behavior of (1-x)LaAlO_3-xSrTiO_3 Solid Solution System at Microwave Frequencies
- Structures and Electrical Properties of (BTM-TS-TTP)_4PF_6
- Ionicity Phase Diagram of Trifluoromethyl-TCNQ (CF_3TCNQ) Charge-Transfer Solids
- Properties of Ferroelectric Memory FET Using Sr_2(Ta,Nb)_2O_7 Thin Film
- Sequential Measurements of Cosmic-Ray Neutron Spectrum and Dose Rate at Sea Level in Sendai, Japan
- Evaluation of Geomagnetic Latitude Dependence of the Cosmic-ray Induced Environmental Neutrons in Japan
- Evaluation of the Altitude Variation of the Cosmic-ray Induced Environmental Neutrons in the Mt. Fuji Area
- 3.2 磁気渦イオン加速(3.臨界密度プラズマを利用したレーザーイオン加速の研究,高強度レーザーを利用したイオン加速とその利用に関する研究)
- 24aRS-6 高速点火における高速電子ビーム強度のスケール則(核融合プラズマ(慣性閉じ込め),領域2,プラズマ基礎・プラズマ科学・核談合プラズマ・プラズマ宇宙物理)
- Molecular Motions and Hydrogen-Bonding Networks in (o-Aminoanilinium)-(Crown Ethers)-[PMo_O_]^ Crystals