Coprecipitation behavior of element 104, Rf, with Sm hydroxide

• Project/Area Number: 24655050
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Inorganic chemistry
• Research Institution: Osaka University
• Principal Investigator: SHINOHARA Atsushi 大阪大学, 理学(系)研究科(研究院), 教授 (60183050)
• Co-Investigator(Kenkyū-buntansha): KASAMATSU Yoshitaka 大阪大学, 大学院理学研究科, 助教 (70435593)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: ラザホージウム / サマリウム共沈 / 超重元素 / 加速器 / Rf / 水酸化物 / 該当しない

Research Abstract

To establish a new chemical experiment for superheavy elements, we have developed a method to rapidly prepare a coprecipitated sample with Sm hydroxide which has good energy resolution in alpha spectrometry. For coprecipitation study of element 104, Rf, we studied coprecipitation behaviors of group 4 elements, Zr, Hf, and Th and also developed an apparatus for rapid preparation of the precipitated samples. Using the developed apparatus, we performed on-line coprecipitation experiments of 85Zr and 169Hf and determined the experimental conditions for Rf. Then, we actually produced 261Rf in the 248Cm(18O, 5n)261Rf reaction with an AVF cyclotron at RIKEN and investigated its coprecipitation behavior in aqueous NH3 and NaOH solutions.

Research Products

• [Journal Article] Online coprecipitation experiment of 85Zr and 169Hf with Sm hydroxide for chemical study of Rf (2014)
  • Author(s): Y. Kasamatsu, K. Toyomura, T. Yokokita, Y. Komori, Y. Shigekawa, H. Haba, J. Kanaya, M. Huang, M. Murakami, K. Morita, H. Kikunaga, and A. Shinohara
  • Journal Title: RIKEN Accelerator Progress Report 2013 Volume: 47
• [Journal Article] Coprecipitation experiment of various elements with Sm hydroxide using multitracer (2014)
  • Author(s): Y. Kasamatsu, K. Toyomura, T. Yokokita, H. Haba, J. Kanaya, Y. Kudou, and A. Shinohara
  • Journal Title: RIKEN Accelerator Progress Report 2013 Volume: 47
• [Journal Article] Coprecipitation behaviors of Zr, Hf, and Th with Sm hydroxide for chemicalstudy of element 104, Rf (2014)
  • Author(s): Y. Kasamatsu, K. Toyomura, N. Shiohara, T. Yokokita, Y. Komori, A. Kino, T. Yoshimura, N. Takahashi, H. Haba, Y. kudou, H. Kikunaga, T. Mitsugashira, T. Ohtsuki, K. Takamiya, A. Shinohara
  • Journal Title: Journal of Nuclear and Radiochemical Sciences Volume: 14 Pages: 7-11
  • Peer Reviewed
• [Journal Article] Online coprecipitation experiment of ^<85>Zr and ^<169>Hf with Sm hydroxide for chemical study of Rf (2013)
  • Author(s): Y. Kasamatsu, K. Toyomura, T. Yokokita, Y. Komori, Y. Shigekawa, H. Haba, J. Kanaya, M. Huang, M. Murakami, K. Morita, H. Kikunaga, and A. Shinohara
  • Journal Title: RIKEN Accelerator Progress Report 2013 Volume: 47(in press)
• [Journal Article] Coprecipitation experiment of various elements with Sm hydroxide using multitracer (2013)
  • Author(s): Y. Kasamatsu, K. Toyomura, T. Yokokita, H. Haba, J. Kanaya, Y. Kudou, and A. Shinohara
  • Journal Title: RIKEN Accelerator Progress Report 2013 Volume: 47(in press)
• [Presentation] 104番元素Rfの水酸化サマリウム共沈挙動 (2014)
  • Author(s): 笠松良崇
  • Organizer: 第58回放射化学討論会
  • Place of Presentation: 愛知(日本)
  • Year and Date: 2014-09-11
• [Presentation] マルチトレーサーを用いた様々な元素の水酸化サマリウム共沈実験 (2014)
  • Author(s): 笠松良崇
  • Organizer: 日本化学会第94春季年会
  • Place of Presentation: 名古屋、愛知
• [Presentation] 104番元素Rfの希アンモニア水中でのサマリウム共沈挙動 (2014)
  • Author(s): 豊村恵悟
  • Organizer: 日本化学会第94春季年会
  • Place of Presentation: 名古屋、愛知
• [Presentation] マルチトレーサーを用いた様々な元素の水酸化サマリウム共沈実験 (2014)
  • Author(s): 笠松良崇
  • Organizer: 日本化学会 第94春季年会
  • Place of Presentation: 名古屋、愛知
• [Presentation] 104番元素Rfの希アンモニア水中でのサマリウム共沈挙動 (2014)
  • Author(s): 豊村恵悟
  • Organizer: 日本化学会 第94春季年会
  • Place of Presentation: 名古屋、愛知
• [Presentation] Coprecipitation behaviors of various elements with Sm hydroxide using multitracer-For the application of precipitation method to superheavy element chemistry- (2013)
  • Author(s): Y. Kasamatsu
  • Organizer: 8th Workshop on the Chemistry of the Heaviest elements
  • Place of Presentation: Takayama, Gifu
• [Presentation] Hydroxide coprecipitation of Zr, Hf, and Th with Sm for chemical study of Rf (2013)
  • Author(s): K. Toyomura
  • Organizer: 5th Asia-Pacific Symposium on Radiochemistry
  • Place of Presentation: Ishikawa, Japan
• [Presentation] Development of a batch-type solid-liquid extraction apparatus for repetitive extraction experiment of element 104, Rf (2013)
  • Author(s): Y. Kasamatsu
  • Organizer: 5th Asia-Pacific Symposium on Radiochemistry
  • Place of Presentation: Ishikawa, Japan
• [Presentation] Development of a Batch-Type Solid-Liquid Extraction Apparatus for Repetitive Extraction Experiment of Element 104, Rf (2013)
  • Author(s): Y. Kasamatsu
  • Organizer: 5th Asia-Pacific Symposium on Radiochemistry
  • Place of Presentation: Kanazawa, Japan
• [Presentation] Hydroxide Coprecipitation of Zr, Hf, and Th with Sm for Chemical Study of Rf (2013)
  • Author(s): K. Toyomura
  • Organizer: 5th Asia-Pacific Symposium on Radiochemistry
  • Place of Presentation: Kanazawa, Japan
• [Presentation] Coprecipitation behaviors of Various Elements with Sm Hydroxide Using Multitracer -For the Application of Precipitation Method to Superheavy Element Chemistry- (2013)
  • Author(s): Y. Kasamatsu
  • Organizer: 8th Workshop on the Chemistry of the Heaviest Elements
  • Place of Presentation: Takayama, Gifu
• [Presentation] Coprecipitation behaviors of Various Elements with Sm Hydroxide Using Multitracer –For the Application of Precipitation Method to Superheavy Element Chemistry– (2013)
  • Author(s): Y. Kasamatsu
  • Organizer: 8th Workshop on the Chemistry of the Heaviest Elements
  • Place of Presentation: Gifu, Japan
• [Presentation] Hydroxide Coprecipitation of Zr, Hf, and Th with Sm for Chemical Study of Rf (2013)
  • Author(s): K. Toyomura
  • Organizer: 5th Asia-Pacific Symposium on Radiochemistry
  • Place of Presentation: Ishikawa, Japan
• [Presentation] Development of a liquid scintillation detection system for aqueous chemistry of seaborgium (2012)
  • Author(s): Y. Komori
  • Organizer: 8th International Conference on Nuclear and Radiochemistry
  • Place of Presentation: Como, Italy
• [Presentation] Extraction of Zr and Hf using TBP and TIOA for the chemistry of element 104 (2012)
  • Author(s): Y. Kasamatsu
  • Organizer: 8th International Conference on Nuclear and Radiochemistry
  • Place of Presentation: Como, Italy