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Title
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The use of composite pulses for improving DEER signal at 94 GHz
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Author
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Abstract
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| The sensitivity of pulsed electron paramagnetic resonance (EPR) measurements on broad-line paramagnetic centers is often limited by the available excitation bandwidth. One way to increase excitation bandwidth is through the use of chirp or composite pulses. However, performance can be limited by cavity or detection bandwidth, which in commercial systems is typically 100-200 MHz. Here we demonstrate in a 94 GHz spectrometer, with >800 MHz system bandwidth, an increase in signal and modulation depth in a 4-pulse DEER experiment through use of composite rather than rectangular it pulses. We show that this leads to an increase in sensitivity by a factor of 3, in line with theoretical predictions, although gains are more limited in nitroxide-nitroxide DEER measurements. (C) 2017 Published by Elsevier Inc. |
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Language
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English
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Source (journal)
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Journal of magnetic resonance. - New York, N.Y.
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Publication
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New York, N.Y.
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2017
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ISSN
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1090-7807
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DOI
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10.1016/J.JMR.2017.03.018
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Volume/pages
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278
(2017)
, p. 122-133
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ISI
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000400723900014
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Pubmed ID
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28402869
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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