Rapid-scan Electron Paramagnetic Resonance

被引：13
|
作者：
Eaton, Gareth R. [1 ]
Eaton, Sandra S. [1 ]
机构：
[1] Univ Denver, Denver, CO 80208 USA
来源：
EMAGRES | 2016年 / 5卷 / 04期
基金：
美国国家科学基金会; 美国国家卫生研究院;
关键词：
direct detection; electron spin relaxation; enhanced signal to noise; passage effects; rapid scan;
D O I：
10.1002/9780470034590.emrstm1522
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
In rapid-scan EPR, the magnetic field is scanned through resonance in a time that is short relative to relaxation times. The signal is recorded with a quadrature mixer at the resonance frequency. Relaxation-time-dependent effects on the trailing edge of the signal are removed by deconvolution, giving the absorption spectrum. For a wide range of samples, the signal-to-noise ratio obtained by rapid scan is substantially higher than for conventional continuous wave spectroscopy because the full spectrum is detected on each pass through resonance, higher microwave power can be used without signal saturation, and coherent averaging decreases noise.
引用
收藏
页码：1529 / 1542
页数：14
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