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.

書誌事項

タイトル別名

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

抄録

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; 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. Over-layered contaminants with high melting temperature below 1023 K on Li₃N surface is completely removed by high temperature thermal desorption up to 1123 K in ultra high vacuum. From these desorption results, it is suggested that these contaminants corresponding to these vaporization peaks are H₂O and Li compounds with high melting temperature below 1023 K, of which LiOH and Li₂CO₃ were synthesized by decomposition process of Li₃N with residual H₂O and CO₂ in low temperature.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 55 (3), 539-542, 2014

  公益社団法人 日本金属学会

キーワード

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

詳細情報

• CRID: 1390282679225794176
• NII論文ID: 40020003036
• NII論文ID: 130004455253
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.m2013257
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 025313986
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025313986
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/55/3/55_M2013257/_pdf
• 本文言語コード: en
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