کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5373282 | 1504214 | 2015 | 8 صفحه PDF | دانلود رایگان |
- Floquet theory.
- Floquet-Magnus expansion.
- Gamma-encoding effect.
- Gamma-symmetry.
- Magic-angle spinning.
In this paper we present a theoretical perturbative approach for describing the NMR spectrum of strongly dipolar-coupled spin systems under fast magic-angle spinning. Our treatment is based on two approaches: the Floquet approach and the Floquet-Magnus expansion. The Floquet approach is well known in the NMR community as a perturbative approach to get analytical approximations. Numerical procedures are based on step-by-step numerical integration of the corresponding differential equations. The Floquet-Magnus expansion is a perturbative approach of the Floquet theory. Furthermore, we address the “γ-encoding” effect using the Floquet-Magnus expansion approach. We show that the average over “γ” angle can be performed for any Hamiltonian with γ symmetry.
Journal: Chemical Physics - Volumes 450â451, 1â15 April 2015, Pages 83-90