Development of boron isotopic composition analysis method using SIMS and its application to geochemical cycle studies

SIMS硼同位素组成分析方法的开发及其在地球化学循环研究中的应用

• 批准号: 18540481
• 负责人: AMAKAWA Hiroshi
• 金额: $ 2.43万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18540481/
• 关键词: boron; isotopic composition; SIMS; standard sample; NIST 951; condensation of atmosphere; seawater; hot sprine water; 大気; NTIMS

We tried to develop a method for determining boron isotopic composition of solution sample using secondary ion mass spectrometer (SIMS) and applied it to a standard sample, i. e., NIST 951 and such natural samples as seawater, hot spring waters and condensation of atmospheric sample.The solution samples were dried on silicon wafer by an infrared lamp for SIMS (NanoSIMS) analysis. During drying of the samples, previous studies have recommended an addition of boron-free seawater for suppressing loss of boron in the samples. However, our study indicates that the addition of boron-free seawater to NIST 951 standard and hot spring samples apparently decreases the beam intensity of boron isotopes compared with those without the addition of boron-free seawater. We think that the boron-free seawater addition method is not effective for NanoSIMS analysis.As for seawater samples, we tried with/without Au (gold) coating sample preparations. The samples without Au coating showed δ^<11> B values ranging +32〜+73, which were quite different form the reported value for seawater (+39.5). On the other hand, δ^<11> B values of sample with Au coating calculated from data of NIST 951 treated by same manner showed +44〜+46, which were nearly identical with the reported value of seawater. Although further studies are required, the Au coating method may be effective for accurate boron isotopic composition analysis using NanoSIMS.δ^<11> B values of the hot spring sample were +2.6 and +5.6, which were within the range of those of volcanic gases of Japan. The condensation of atmospheric sample collected at Ocean Research Institute, University of Tokyo showed δ^<11> B values of -5.1, -1.8 and +5.0, which is almost same as δ^<11> B value (+1.7) of sample collected at the same location.These facts suggest that NanoSIMS could be used for accurate boron isotopic determination of natural solution samples.

我们试图使用二级离子质量光谱仪（SIMS）DARD样品（即NIST 951）和海水，温泉水和大气样品的固体来开发溶液样品的硼同位素组合。用于SIMS的灯（纳米菌）分析。我们认为无硼的海水添加方法对纳米岛分析无效。作为海水样品，我们尝试使用/不使用AU（黄金）涂料样品。 - +73，这是完全不同的海水报道值（+39.5）。尽管需要进一步的研究，但几乎与海水的报道值相同，但使用<11^11> B值的精确硼同位素组成分析可能有效。日本的气体。的琵琶样品。

项目成果

Vertical distribution of Scandium in the North Central Pacific

中北太平洋钪的垂直分布

• 发表时间: 2007
• 期刊: Geophysical Research Letters 34
• 作者: H. Amakawa;M. Nomura;K. Sasaki;Y. Oura and M. Ebihara
• 通讯作者: Y. Oura and M. Ebihara

Technological development for half-life measurement of ^<146>Sm nuclide

^<146>Sm核素半衰期测量技术进展

• 发表时间: 2007
• 期刊: Journal of Nuclear and Radiochemical Sciences 8
• 作者: N. Kinoshita;et. al. (5th author in 25 authors)
• 通讯作者: et. al. (5th author in 25 authors)

アユ耳石のストロンチウム安定同位体比

香鱼耳石的锶稳定同位素比值

• 发表时间: 2007
• 作者: H. Endo;Y. Agatsuma;K. Taniguchi;鈴木隆史
• 通讯作者: 鈴木隆史

Nano-SIMSを用いた耳石中のSr同位体比測定

使用 Nano-SIMS 测量耳石中的 Sr 同位素比

• 发表时间: 2006
• 作者: 佐野有司;高畑直人;白井厚太朗;天川裕史;大竹二雄
• 通讯作者: 大竹二雄

Ultra-sensitive detection of p-process nuclide ^<146>Sm produced by (γ, n), (p,pn ε) and (n, 2n) reactions

超灵敏检测 (γ, n)、(p,pn ε) 和 (n, 2n) 反应产生的 p 过程核素 ^<146>Sm

• 发表时间: 2008
• 期刊: Journal of Physics-G: Nuclear and Particle Physics Sciences 35
• 作者: Kinoshita N.;Hashimoto;T. Nakanishi;A. Yokoyama;H. Amakawa;T. Mitsugashira;T. Ohtsuki;N. Takahashi;I. Ahmad;J. P. Greene;D. J. Henderson;C. L. Jiang;M. Notani;R. C. Pardo;N. Patel;K. E. Rehm;R. Scott;R. Vondrasek;L. Jisonna;P. Collon;D
• 通讯作者: D