Production mechanism of radioactive aerosols in high radiation area

• Project/Area Number: 25790081
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Quantum beam science
• Research Institution: Kyoto University
• Principal Investigator: Sekimoto Shun 京都大学, 原子炉実験所, 助教 (10420407)
• Research Collaborator: OKUMURA Shintaro ; OHTSUKI Tsutomu ; YASHIMA Hiroshi
• Project Period (FY): 2013-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 軽核 / Be-10 / Al-26 / 加速器質量分析 / 放射性エアロゾル / フェルミ国立加速器研究所 / 非放射性エアロゾル / フェルミラボ / パーティクルカウンタ / 120 GeV

Outline of Final Research Achievements

The production cross sections of Be-10 and Al-26 produced from various target materials (Co, Ni, Cu, Y, Au) irradiated with 120 GeV protons and those of Be-10 from Cu, Y and Tb targets irradiated with 400 MeV protons were measured by accelerator mass spectrometry. Those of Be-10 and Al-26 obtained in this work are compared to the literature data, which are production cross sections of corresponding light nuclides produced from various target elements irradiated with 50 MeV-12 GeV protons. From the comparison, induced energy- and target mass number-dependence of production cross section of light nuclides were discussed and then, it was suggested that dependence of production cross sections of light nuclides on the target mass number is affected by the binding energy. The difference in the absolute values between production cross sections of Be-10 and Al-26 may depend on the ompact parameter and the target nucleus stiffness.

Research Products

• [Journal Article] Separation and purification of Tc-99m from Mo-99 produced by electron linear accelerator (2017)
  • Author(s): Shun Sekimoto, Katsuyoshi Tatenuma, Yumi Suzuki, Akira Tsuguchi, Atsushi Tanaka, Takahiro Tadokoro, Yuko Kani, Yasumasa Morikawa, Asaki Yamamoto, Tsutomu Ohtsuki
  • Journal Title: Journal of Radioanalytical and Nuclear Chemistry Volume: 311 Issue: 2 Pages: 1361-1366
  • DOI: 10.1007/s10967-016-4959-2
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Accurate determination of chlorine, bromine, and iodine in U.S. Geological Survey geochemical reference materials by radiochemical neutron activation analysis (2017)
  • Author(s): Shun Sekimoto, Mitsuru Ebihara
  • Journal Title: Geostandards and Geoanalytical Research Volume: 印刷中 Issue: 2 Pages: 213-219
  • DOI: 10.1111/ggr.12145
  • Acknowledgement Compliant
• [Journal Article] Origin of spherule samples recovered from Antarctic ice sheet -terrestrial or extraterrestrial? (2016)
  • Author(s): S. Sekimoto, T. Kobayashi, K. Takamiya, M. Ebihara, S. Shibata
  • Journal Title: Nuclear Engineering and Technology Volume: 48 Issue: 2 Pages: 293-298
  • DOI: 10.1016/j.net.2016.02.004
  • NAID: 120005893544
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] 京大炉を用いた中性子放射化分析の例 (2016)
  • Author(s): 関本 俊
  • Journal Title: 日本応用物理学会 放射線分科会会誌「放射線」 Volume: 42 Pages: 11-14
• [Journal Article] Application of neutron activation analysis to micro gram scale of solid samples (2016)
  • Author(s): S. Sekimoto, N. Shirai, M. Ebihara
  • Journal Title: Journal of Radioanalytical and Nuclear Chemistry Volume: 307 Issue: 3 Pages: 1757-1764
  • DOI: 10.1007/s10967-015-4370-4
  • NAID: 120005890314
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Observation of attachment ratio of fission products on solution aerosol (2016)
  • Author(s): K. Takamiya, T. Tanaka, S. Nitta, S. Itosu, S. Sekimoto, Y. Oki, T. Ohtsuki
  • Journal Title: Journal of Radioanalytical and Nuclear Chemistry Volume: 307 Issue: 3 Pages: 2227-2230
  • DOI: 10.1007/s10967-015-4574-7
  • Peer Reviewed
• [Journal Article] Measurements of production cross sections of 10Be and 26Al by 120 GeV and 392 MeV proton bombardment of 89Y, 159Tb, and natCu targets (2015)
  • Author(s): S. Sekimoto, S. Okumura, H. Yashima, Y. Matsushi, H. Matsuzaki, H. Matsumura, N. Matsuda, Y. Kasugai, H. Nakashima, D. Boehnlein, R. Coleman, G. Lauten, A. Leveling, N. Mokhov, E. Ramberg, A. Soha, K. Vaziri, K. Ninomiya, T. Omoto, T. Shima, A. Shinohara, M.W. Caffee, K.C. Welten, K. Nishiizumi, T. Ohtsuki, et al.
  • Journal Title: Nuclear Instruments and Methods in Physics Research B Volume: 361 Pages: 685-688
  • DOI: 10.1016/j.nimb.2015.08.001
  • NAID: 120005689187
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Measurements of Cross Sections for Neutron-induced Reactions on Chromium and Yttrium Targets at 197 MeV (2014)
  • Author(s): Sekimoto et al.
  • Journal Title: Nuclear Data Sheets Volume: 119 Pages: 197-200
  • DOI: 10.1016/j.nds.2014.08.055
  • Peer Reviewed
• [Journal Article] MEASUREMENTS OF THE NEUTRON ACTIVATION CROSS SECTIONS FOR BI AND COAT 386 MeV (2014)
  • Author(s): H. Yashima, S. Sekimoto et al.
  • Journal Title: Radiation Protection Dosimetry Volume: 161 Issue: 1-4 Pages: 139-143
  • DOI: 10.1093/rpd/nct334
  • Peer Reviewed
• [Journal Article] Radionuclides in the cooling water systems for the NuMI beamline and the antiproton production target station at Fermilab (2014)
  • Author(s): H. Matsumura, S. Sekimoto et al.
  • Journal Title: Progress in Nuclear Science and Technology Volume: 4 Pages: 372-375
• [Journal Article] Comparison of activity among fluorescent lamps and light emitting diodes lamps exposed to secondary particles in accelerator rooms (2014)
  • Author(s): A. Toyoda, H. Matsumura, K. Masumoto, S. Sekimoto et al.,
  • Journal Title: Progress in Nuclear Science and Technology Volume: 4 Pages: 384-387
• [Journal Article] Measurement and analysis of neutron and photon dose rate in concrete shield of 120-GeV proton accelerator facility (2014)
  • Author(s): K. Oishi, K. Kosako, Y. Kasugai, N. Matsuda, H. Yashima, S. Sekimoto
  • Journal Title: Progress in Nuclear Science and Technology Volume: 4 Pages: 197-200
• [Journal Article] Accurate determination of chlorine, bromine, and iodine in sedimentary rock reference samples by radiochemical neutron activation analysis and a detailed comparison with ICP-MS literature data. (2013)
  • Author(s): S. Sekimoto and M. Ebihara
  • Journal Title: Analytical Chemistry Volume: 85 Issue: 13 Pages: 6336-6341
  • DOI: 10.1021/ac400637d
  • Peer Reviewed
• [Presentation] Zinc and tellurium contents in tellurite glass materials (2016)
  • Author(s): S. Sekimoto, K. Shikano, S. Fukutani, T. Ohtsuki
  • Organizer: 9th International Conference on Nuclear and Radiochemistry
  • Place of Presentation: Helsinki
  • Year and Date: 2016-08-28
  • Int'l Joint Research
• [Presentation] Measurements of production cross sections of Be-10 and Al-26 by 120 GeV proton bombardment of Ni-nat., Co-59, and Au-197 targets (2016)
  • Author(s): S. Sekimoto, S. Okumura, H. Yashima, T. Ohtsuki
  • Organizer: 9th International Conference on Nuclear and Radiochemistry
  • Place of Presentation: Helsinki
  • Year and Date: 2016-08-28
  • Int'l Joint Research
• [Presentation] 電子線形加速器を利用した医療用核種製造システムの検討 （1）概要及び製造可能核種 (2016)
  • Author(s): 関本俊、田所孝広、可児祐子、蓼沼克嘉，Jang Jaewoong，山本昌志，大槻勤
  • Organizer: 2016年原子力学会春の年会
  • Place of Presentation: 東北大学(宮城県仙台市）
  • Year and Date: 2016-03-26
• [Presentation] 放射化学的中性子放射化分析法を用いた、地球化学的固体試料中の微量ハロゲンの分析 (2015)
  • Author(s): 関本 俊、海老原 充
  • Organizer: 第76回 応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場(愛知県名古屋市）
  • Year and Date: 2015-09-13
  • Invited
• [Presentation] 電子線形加速器を利用した医療用核種製造の検討 (1) 製造可能な核種の検討 (2015)
  • Author(s): 関本俊、糸洲慧視、田所孝広、可児祐子、大槻勤
  • Organizer: 2015年原子力学会秋の大会
  • Place of Presentation: 静岡大学(静岡県静岡市)
  • Year and Date: 2015-09-09
• [Presentation] Accurate determination of chlorine, bromine, and iodine in U.S. Geological Survey geochemical reference materials by radiochemical neutron activation analysis and an exhaustive comparison with literature data (2015)
  • Author(s): S. Sekimoto, M. Ebihara
  • Organizer: Modern trends in activation analysis -14
  • Place of Presentation: Delft, Netherland
  • Year and Date: 2015-08-23
  • Int'l Joint Research
• [Presentation] Determination of zinc and tellurium in tellurite glass materials (2015)
  • Author(s): S. Sekimoto, K. Shikano, S. Itosu, S. Nitta, T. Tanaka, T. Ohtsuki
  • Organizer: Modern trends in activation analysis -14
  • Place of Presentation: Delft, Netherland
  • Year and Date: 2015-08-23
  • Int'l Joint Research
• [Presentation] Trace amounts of halogens (Cl, Br and I) in Mantle Xenolith samples (2015)
  • Author(s): S. Sekimoto, M. Ebihara, N. Shirai, Y. Homura, T. Ohtsuki
  • Organizer: Goldschmidt2015
  • Place of Presentation: Prague, Czech
  • Year and Date: 2015-08-16
  • Int'l Joint Research
• [Presentation] Application of neutron activation analysis to micro gram scale of solid samples (2015)
  • Author(s): S. Sekimoto, N. Shirai, M. Ebihara
  • Organizer: Methods and Application of Radioanalytical Chemistry-10
  • Place of Presentation: Kona, Hawaii, USA
  • Year and Date: 2015-04-12
  • Int'l Joint Research
• [Presentation] Basic Examination of a 99Mo / 99mTc Production System Using an Electron Linear Accelerator (2015)
  • Author(s): S. Sekimoto, T. Tadokoro, Y. Kani, T. Ohtsuki
  • Organizer: Methods and Application of Radioanalytical Chemistry-10
  • Place of Presentation: Kona, Hawaii, USA
  • Year and Date: 2015-04-12
  • Int'l Joint Research
• [Presentation] 120 GeV、400 MeV 陽子とY による軽核の核反応断面積の測定 (2014)
  • Author(s): 奥村慎太郎、関本俊、他
  • Organizer: 2014 日本放射化学会年会・第58 回放射化学討論会
  • Place of Presentation: 名古屋大学工学部
  • Year and Date: 2014-09-11 – 2014-09-13
• [Presentation] Measurements of cross sections for production of light nuclides by 120 GeV and 400 MeV proton bombardment of Y (2014)
  • Author(s): Sekimoto et al.
  • Organizer: 13th Accelerator Mass Spectrometry (AMS-13)
  • Place of Presentation: Aix en Provence (France)
  • Year and Date: 2014-08-24 – 2014-08-29
• [Presentation] Trace amounts of halogens (Cl, Br and I) in 16 U.S. Geological Survey geochemical reference materials (2014)
  • Author(s): S. Sekimoto, M. Ebihara
  • Organizer: Goldschmidt国際会議 2014
  • Place of Presentation: Sacramento (USA)
  • Year and Date: 2014-06-08 – 2014-06-13
• [Presentation] Trace Amounts of Halogens (Cl, Br, I) in 16 U.S.Geological Survey Geochemical Reference Materials (2014)
  • Author(s): 関本俊、海老原充
  • Organizer: Ｇｏｌｄｓｃｈｍｉｄｔ国際会議 2014
  • Place of Presentation: Sacramento
• [Presentation] Basic Examination of a Mo-99/Tc-99m Production System Using an Electron Linear Accelerator (2014)
  • Author(s): 関本俊、大槻勤
  • Organizer: 8th International Conference on Isotopes and Expo (8ICI)
  • Place of Presentation: Ｃｈｉｃａｇｏ
• [Presentation] Measurements of cross sections for production of light nuclides by 120 GeV and 400 MeV proton bombardment of Y (2014)
  • Author(s): 関本俊、奥村慎太郎、大槻勤ら28名
  • Organizer: 13th Accelerator Mass Spectrometry (AMS-13)
  • Place of Presentation: Aix en Provence
• [Presentation] Radiochemical neutron activation analysis of halogens (Cl, Br and I) in geological and cosmochemical samples (2013)
  • Author(s): 海老原充、関本俊
  • Organizer: 5th Asia-Pacific Symposium on Radiochemistry
  • Place of Presentation: 金沢市
• [Presentation] Neutron Activation Analysis of JCFA-1, JCu-1 and JZn-1 (2013)
  • Author(s): 関本俊、布村優太、奥村良、白井直樹
  • Organizer: 5th Asia-Pacific Symposium on Radiochemistry
  • Place of Presentation: 金沢市