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- Makishima Akio
- Laboratory for REE Microanalysis, Department of Chemistry, Faculty of Science, The University of Tokyo
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- Shimizu Hiroshi
- Laboratory for REE Microanalysis, Department of Chemistry, Faculty of Science, The University of Tokyo
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- Masuda Akimasa
- Laboratory for REE Microanalysis, Department of Chemistry, Faculty of Science, The University of Tokyo
書誌事項
- タイトル別名
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- Precise measurement of cerium and lanthanum isotope ratios.
- Precise Measurement on Cerium and Lanth
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抄録
The isotope ratios of cerium and lanthanum are determined precisely by a surface ionization mass spectrometer. 138Ce/142Ce and 140Ce/142Ce ratios for Ce standard solution are 0.0225762± 0.0000014 (2σ) and 7.9471±0.0003 (2σ), normalized to 136Ce/142Ce=0.01688, respectively. 138La/139La ratio is 0.0009025±0.0000005 (2σ). The oxygen isotope ratios in measurements of REE as oxide ions are 0.0003916±0.0000014 (2σ) and 0.002129±0.000010 (2σ) for 17O/16O and 18O/16O. The isotopic abundances (%) of 136Ce, 138Ce, 140Ce and 142Ce are calculated to be 0.1878, 0.2512, 88.433 and 11.128, respectively. The isotopic abundances (%) of 138La and 139La are calculated to be 0.09016 and 99.9098. These isotopic abundances obtained here give the following relation:<br>(138La/142Ce)ATOMIC=0.008173×(La/Ce)WEIGHT.<br>These precise isotopic abundances on Ce and La are fundamental values in a La-Ce geochronometer.
収録刊行物
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- 質量分析
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質量分析 35 (2), 64-72, 1987
一般社団法人 日本質量分析学会
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詳細情報 詳細情報について
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- CRID
- 1390001206493471232
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- NII論文ID
- 130000258846
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- NII書誌ID
- AN0010555X
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- ISSN
- 05428645
- 18804225
- 18843271
- 13408097
- http://id.crossref.org/issn/13408097
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- NDL書誌ID
- 3131718
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可