Table 2

Energy difference considerations for different Ln related to environment induced emission quenching.

ΔE4 (cm−1)
Ln [initial energy level (i), final energy level (f)]
Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb
6940 [1D2, 1G4] 5410 [4F3/2, 4I15/2] 7400 [4G5/2, 6F11/2] 12300 [5D0, 7F6] 32200 [6P7/2, 8S7/2] 15100 [5D4, 7F0] 7850 [4F9/2, 6F3/2] 3000 [5S2, 5F5] 3100 [4S3/2, 4F9/2] 6650 [1D2, 1G4] 10240 [2F5/2, 2F7/2]
3910 [3P0, 1D2] 2200 [5F5, 5I4] 2850 [4F9/2, 4I9/2] 6250 [1G4, 3F2]
6490 [4I13/2, 4I15/2] 4300 [3H4, 3H5]

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