NMR detection of short-lived β-emitter ¹²N implanted in water

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• 作者：T. Sugihara ; M. Mihara ; J. Shimaya ; K. Matsuta ; M. Fukuda…
• 关键词：β ; NMR ; Implantation ; Nitrogen ; NMR spectroscopy
• 刊名：Hyperfine Interactions
• 出版年：2017
• 出版时间：November 2017
• 年：2017
• 卷：238
• 期：1
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Nuclear Physics, Heavy Ions, Hadrons; Atomic, Molecular, Optical and Plasma Physics; Condensed Matter Physics; Surfaces and Interfaces, Thin Films;
• 出版者：Springer International Publishing
• ISSN：1572-9540
• 卷排序：238

文摘

The beta-detected nuclear magnetic resonance (β-NMR) in liquid H₂O has been observed for the first time using a short-lived β-ray emitter 12N (Iπ = 1+,T_1/2=11 ms). A nuclear spin polarized 12N beam with an energy of about 20 MeV/nucleon was implanted into an enclosed water sample. About 50 % of implanted 12N ions maintained nuclear polarization and exhibited a β-NMR spectrum. The chemical shift of 12N in H₂O relative to 12N in Pt was deduced to be −(3.6±0.5) × 102 ppm.