Quantum and Classical Spin Dynamics in Silicon NMR

Recent Si29 NMR measurements [A.E. Dementyev, D. Li, K. MacLean, S.E. Barrett, Phys. Rev. B, 68, 153302(2003)] revealed several surprises, such as unexpectedly long tails and even-odd asymmetry in CPMG data. To understand these phenomena, we implemented a series of simulations with increasing levels of sophistication designed to reflect the actual experimental conditions (e.g. including H1 field inhomogeneity, finite pulse duration, etc.). I will present the simulations, compare them with our data and discuss the implications.