Аннотация

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.

Язык оригиналаанглийский
Страницы (с-по)1233-1240
Число страниц8
ЖурналApplied Magnetic Resonance
Том50
Номер выпуска10
DOI
СостояниеОпубликовано - 1 окт 2019

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