Surficial Chemical States of Li₃N Synthesized on Lithium Target for Boron Neutron Capture Therapy

• Ishiyama Shintaro

  Quantum Beam Science Directorate, Japan Atomic Energy Agency

• Baba Yuji

  Quantum Beam Science Directorate, Japan Atomic Energy Agency

• Fujii Ryo

  Cancer Intelligence Care Systems, Inc.

• Nakamura Masaru

  Cancer Intelligence Care Systems, Inc.

• Imahori Yoshio

  Cancer Intelligence Care Systems, Inc.

Bibliographic Information

Other Title

• ホウ素中性子捕獲療法のためのリチウムターゲット表面に合成した Li₃N の表面化学状態
• ホウ素中性子捕獲療法のためのリチウムターゲット表面に合成したLi₃Nの表面化学状態
• ホウソ チュウセイシ ホカク リョウホウ ノ タメ ノ リチウムターゲット ヒョウメン ニ ゴウセイ シタ Li ₃ N ノ ヒョウメン カガク ジョウタイ
• Surficial Chemical States of Li3N Synthesized on Lithium Target for Boron Neutron Capture Therapy

Abstract

  To remove high level of contaminants by O and C from Li₃N surface for Boron Neutron Capture Therapy target, high temperature thermal desorption was conducted up to 1123 K in ultra high vacuum and the following results were derived; (1) During thermal desorption up to 1023 K, typical three peaks of vacuum pressure disturbance due to vaporization of contaminants were observed in vacuum pressure-temperature curve. (2) Over-layered contaminants having lower melting point than 1023 K on Li₃N surface is completely removed by high temperature thermal desorption up to 1123 K in ultra high vacuum. (3) From these desorption results, it is suggested that these contaminants corresponding to these vaporization peaks are H₂O and Li compounds having lower melting point than 1023 K, of which LiOH and Li₂CO₃ were synthesized by decomposition process of Li₃N with residual H₂O and CO₂ in low temperature.<br>

Journal

• Journal of the Japan Institute of Metals and Materials

  Journal of the Japan Institute of Metals and Materials 78 (8), 322-325, 2014

  The Japan Institute of Metals and Materials

Keywords

• boron neutron capture therapy
• neutron source
• lithium target
• lithium nitride
• nitrogen gas
• contamination

Details

• CRID: 1390282681457751936
• NII Article ID: 130004678166
• NII Book ID: AN00187860
• DOI: 10.2320/jinstmet.j2014022
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL BIB ID: 025746906
• Web Site: http://id.ndl.go.jp/bib/025746906
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025746906
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet/78/8/78_J2014022/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed