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This article is cited in 2 scientific papers (total in 2 papers)
CONDENSED MATTER
Theoretical treatment of pulsed Overhauser DNP: consideration of a general periodic pulse sequence
E. A. Nasibulovab, A. S. Kiryutinab, A. V. Yurkovskayaab, H.-M. Viethcb, K. L. Ivanovab a Novosibirsk State University, 630090 Novosibirsk, Russia
b International Tomography Center SB of the RAS, 630090 Novosibirsk, Russia
c Freie Universität Berlin, 14195 Berlin, Germany
Abstract:
A general theoretical approach to pulsed Overhauser-type Dynamic Nuclear Polarization (DNP) is presented. DNP is a powerful method to create non-thermal polarization of nuclear spins, thereby enhancing their nuclear magnetic resonance signals. The theory presented can treat pulsed microwave irradiation of electron paramagnetic resonance transitions for periodic pulse sequences of general composition. DNP enhancement is analyzed in detail as a function of the microwave pulse length for rectangular pulses and pulses with finite rise time. Characteristic oscillations of the DNP enhancement are found when the pulse-length is stepwise increased, originating from coherent motion of the electron spins driven by the pulses. Experimental low-field DNP data are in very good agreement with this theoretical approach.
Received: 28.03.2016
Citation:
E. A. Nasibulov, A. S. Kiryutin, A. V. Yurkovskaya, H.-M. Vieth, K. L. Ivanov, “Theoretical treatment of pulsed Overhauser DNP: consideration of a general periodic pulse sequence”, Pis'ma v Zh. Èksper. Teoret. Fiz., 103:9 (2016), 662–667; JETP Letters, 103:9 (2016), 582–587
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https://www.mathnet.ru/eng/jetpl4933 https://www.mathnet.ru/eng/jetpl/v103/i9/p662
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