Nuclear-Spin Relaxation in the Rotating Frame in SolidD2
نویسندگان
چکیده
منابع مشابه
Efficiency of paramagnetic relaxation enhancement in off-resonance rotating frame.
Transferring from laboratory frame to off-resonance rotating frame for the (1)H spin can compensate the relaxivity loss for paramagnetic agents at the magnetic field strength higher than 3 Tesla and enhance water relaxation rate constant significantly. A comprehensive theory for calculating the relaxation rate constants in the off-resonance rotating frame is described. This theory considers the...
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Introduction Rotating frame relaxation rates (R1ρ and R2ρ) measured during continuous-wave spin-lock pulse depend on the frequency offset (ΔΩ) between the pulse and the isochromat of interest [1]. This characteristic impairs a time-efficient utilization of this method for MRS applications in vivo, since data need to be acquired separately for each metabolite of interest. The present work invest...
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Methods In Fig. 1, the low-power rf pulse (ω1)y and frequency offset ∆ω constitute an effective spin-locking field along the z′ axis of a tilted rotating frame, with an effective frequency 2 2 1 ( ) e ω ω ω = + ∆ and a tilt angle θ = arctan(ω1/∆ω) with respect to the normal Larmor rotating frame (θ = π/2 for an on-resonance spin-locking pulse without frequency offset) [1,2]. The magnetization a...
متن کاملNuclear spin relaxation in glassy ionic conductors
The nuclear spin relaxation behaviour in disordered ionically conducting materials is ascribed to a mechanism based on diffusion-controlled relaxation. In this targetdiffusion model, relaxation is assumed to occur at interstitialcy sites, triggered by the arrival of diffusing ions. The dependence of the spin-lattice relaxation rate on the temperature, Larmor frequency and ionic concentration ca...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1973
ISSN: 0556-2805
DOI: 10.1103/physrevb.7.2960