Magic-angle spinning electron paramagnetic resonance spectroscopy. Hubrich, M, Bauer, C, & Spiess, H W Chemical Physics Letters, 273:259–264, 1997.
abstract   bibtex   
Pulsed electron paramagnetic resonance (EPR) has been combined with magic-angle spinning (MAS) to extract highly-resolved isotropic EPR signals from anisotropic powder spectra. With a self-built probe head, pulsed EPR experiments are performed during sample rotation with a spinning speed of almost 17 kHz. Analogous to the ultra-slow MAS experiment in NMR, in the MAS-EPR experiment transverse magnetization evolves at selected rotor positions, leading to an averaging of anisotropic contributions. The MAS-EPR spectrum of E'~ centers in y-irradiated silica has been recorded, where averaging of the anisotropic g-factor leads to an isotropic resonance line of 1 MHz spectral width, comparable to EPR lines in low viscous liquids.
@article{Hubrich1997a,
	title = {Magic-angle spinning electron paramagnetic resonance spectroscopy},
	volume = {273},
	abstract = {Pulsed electron paramagnetic resonance (EPR) has been combined with magic-angle spinning (MAS) to extract highly-resolved isotropic EPR signals from anisotropic powder spectra. With a self-built probe head, pulsed EPR experiments are performed during sample rotation with a spinning speed of almost 17 kHz. Analogous to the ultra-slow MAS experiment in NMR, in the MAS-EPR experiment transverse magnetization evolves at selected rotor positions, leading to an averaging of anisotropic contributions. The MAS-EPR spectrum of E'{\textasciitilde} centers in y-irradiated silica has been recorded, where averaging of the anisotropic g-factor leads to an isotropic resonance line of 1 MHz spectral width, comparable to EPR lines in low viscous liquids.},
	journal = {Chemical Physics Letters},
	author = {Hubrich, M and Bauer, C and Spiess, H W},
	year = {1997},
	pages = {259--264},
}

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