Table 5. The calculated lifetime (τ_cal, μs), experimental lifetime (τ_exp, μs), quantum efficiency (η, %), and energy transfer probability (W_ET, s⁻¹) from the ⁵D₀ level.

Sample	τ cal	τ exp	η	W ET
Z0.5	1333	1110	83.27	149.02
Z1	1388	830	59.80	480.18
Z3	1259	680	54.01	676.31
Z5	1366	580	42.46	992.07
Z7	1402	500	35.66	1286.73