Luminescence Studies of Eu³⁺ Doped Calcium Bromofluoride Phosphor

Table 5

Kinetic parameters for CaFBr doped with 0.5% Eu.

UV min	𝑇1	𝑇𝑚	𝑇2	𝜏	𝛿	𝜔	𝜇𝑔=𝛿/𝜔	Activation energy (E)	Frequency factor (s)
10 min	70	94	118	24	24	48	0.50	0.72	2×10^11
15 min	71	94	121	23	27	50	0.54	0.76	6×10^11
20 min	71	94	123	23	29	52	0.55	0.77	7×10^11
25 min	72	94	118	22	24	46	0.52	0.79	2×10^12
30 min	75	99	120	24	21	45	0.46	0.74	2×10^11