The largest such difference, Γ NTO -d CD1 = 8.9 Å, occurs for S 0 → S 19 so we examine that transition in detail. The numerical difference between d CD1 and Γ NTO in this case is driven almost entirely by the difference between d e-h and (∆r) NTO , values for which are provided in Fig. alongside the principal NTOs. The ψ hole