Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH 43210, USA.
J Magn Reson. 2011 Apr;209(2):337-40. doi: 10.1016/j.jmr.2011.01.013. Epub 2011 Jan 26.
For continuous-wave electron paramagnetic resonance spectroscopy, what settings of magnetic field sweep width and field modulation amplitude yield the best accuracy in estimated linewidth? Statistical bounds on estimation error presented in this work provide practical guidance: set the sweep width and modulation amplitude to 8 and 4 times the half-width half-maximum linewidth, Γ, respectively. For unknown linewidths in the range [Γ(min),Γ(max)] the worst-case estimation error is minimized by using settings designed for Γ(max). The analysis assumes a Lorentzian lineshape and a constant modulation amplitude across the extent of the irradiated paramagnetic probe. The analytical guidelines are validated using L-band spectroscopy with a particulate LiNc-BuO probe.
对于连续波电子顺磁共振波谱学，磁场扫描宽度和场调制幅度的哪些设置可在估计线宽方面获得最佳精度？本工作中提出的估计误差的统计界限提供了实际指导：将扫描宽度和调制幅度分别设置为半峰全宽的 8 倍和 4 倍，Γ。对于[Γ（min），Γ（max）]范围内的未知线宽，使用针对Γ（max）设计的设置可将最坏情况下的估计误差最小化。该分析假设洛伦兹线型和在辐照顺磁探针范围内恒定的调制幅度。使用带有颗粒状 LiNc-BuO 探针的 L 波段光谱学对分析指南进行了验证。
