Figure 12.

DEST profiles. (a) Parameters used for calculations were Δω₂₁/2π = 200 Hz, ω₁/2π = 200 Hz, k_ex = 1200 s⁻¹, R₁₁ = R₁₂ = 2.5 s⁻¹, R₂₁ = 6 s⁻¹, and ΔR₂₁ = 20,000 s⁻¹. Thick lines show calculations for p₂ = 0.05 and thin lines show calculations for p₂ → 0. (black, solid) Numerical integration of the Bloch-McConnell equations, (blue, dotted) Baldwin-Kay equation,(Baldwin & Kay, 2013) and (orange, dashed) Eqs. 40 and 42. (b) Results are calculated with ΔR₂₁ = 200,000 s⁻¹ and other parameters as in (a). Lines are drawn as in (a) except that the dashed orange line is the limit of Eq. 42 as as ΔR₂₁ → ∞.