论文标题
超低场NMR样品容器的铁磁污染。量化问题和可能的解决方案
Ferromagnetic contamination of Ultra-Low-Field-NMR sample containers. Quantification of the problem and possible solutions
论文作者
论文摘要
根据质子的进攻，研究了超低场（ULF）NMR样品容器中弱育的存在。用于NMR检测的高敏性磁力计，可以同时测量通过铁磁污染物在样品接近中产生的静态场的测量。基于X射线荧光光谱和次级离子质谱法，通过高分辨率化学分析来研究后者的存在。探索和表征减少污染的方法。这项研究在任何ULF-NMR实验中都具有相关性，因为在ULF政权中，虚假的铁磁势很容易成为人工制品的主要原因。
The presence of a weak remanence in Ultra-Low-Field (ULF) NMR sample containers is investigated on the basis of proton precession. The high-sensitivity magnetometer used for the NMR detection, enables simultaneously the measurement of the static field produced in the sample proximity by ferromagnetic contaminants. The presence of the latter is studied by high resolution chemical analyses of the surface, based on X-ray fluorescence spectroscopy and secondary ions mass spectroscopy. Methodologies to reduce the contamination are explored and characterized. This study is of relevance in any ULF-NMR experiment, as in the ULF regime spurious ferromagnetism becomes easily a dominant cause of artefacts.
