Email this article Theoretical Treatment of Pulsed DNP Experiments: Effects of Spectral Exchange
- Authors: Nasibulov E.A.1,2,3, Ivanov K.L.1,2, Sagdeev R.Z.1,2,4
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Affiliations:
- International Tomography Center, Siberian Branch of the Russian Academy of Science
- Novosibirsk State University
- A.P. Ershov Institute of Informatics Systems, Siberian Branch of the Russian Academy of Science
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Science
- Issue: Vol 50, No 10 (2019)
- Pages: 1233-1240
- Section: Original Paper
- URL: https://journals.rcsi.science/0937-9347/article/view/248672
- DOI: https://doi.org/10.1007/s00723-019-01144-6
- ID: 248672
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Abstract
In the present work, we provide a theoretical treatment of pulsed Overhauser-type dynamic nuclear polarization (DNP) in the presence of spectral exchange, namely, Heisenberg exchange. The expression for the DNP enhancement of a nuclear magnetic resonance (NMR) signal is generalized by redefining the “deviation factor”, expressing the deviation of the electron spin polarization from its equilibrium value, averaged over the period of the pulse sequence. We can demonstrate that spectral exchange significantly increases the deviation factor and, thus, the NMR enhancement. The present treatment allows one to determine the optimal pumping frequency at different exchange rates.
About the authors
Egor A. Nasibulov
International Tomography Center, Siberian Branch of the Russian Academy of Science; Novosibirsk State University; A.P. Ershov Institute of Informatics Systems, Siberian Branch of the Russian Academy of Science
Author for correspondence.
Email: nasibulov@tomo.nsc.ru
ORCID iD: 0000-0001-6895-7915
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090; Novosibirsk, 630090
Konstantin L. Ivanov
International Tomography Center, Siberian Branch of the Russian Academy of Science; Novosibirsk State University
Email: nasibulov@tomo.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090
Renad Z. Sagdeev
International Tomography Center, Siberian Branch of the Russian Academy of Science; Novosibirsk State University; Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Science
Email: nasibulov@tomo.nsc.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090; Moscow, 119991
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