期刊
JOURNAL OF CHEMICAL PHYSICS
卷 130, 期 21, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3139064
关键词
magnetic fields; nuclear magnetic resonance; spin-lattice relaxation
资金
- EPSRC (UK)
- Engineering and Physical Sciences Research Council [EP/D079209/1] Funding Source: researchfish
- EPSRC [EP/D079209/1] Funding Source: UKRI
In a previous paper [M. Carravetta and M. H. Levitt, J. Chem. Phys. 122, 214505 (2005)], we presented the theory of long-lived nuclear spin singlet states in low magnetic field. In this paper, we consider the spin locking of long-lived singlet states in high magnetic field by the application of resonant radio frequency irradiation. We present theoretical results for unmodulated irradiation, including approximate analytical expressions for the singlet decay rate constants. We show the results of numerical simulations, which indicate that modulated radio frequency fields may be used to achieve broadband spin locking of singlet states but only in the case of a small difference in Larmor frequencies between the members of the spin pair.
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