Luminescence Studies of Eu³⁺ Doped Calcium Bromofluoride Phosphor

Table 4

Kinetic parameters for CaFBr doped with 0.2% Eu.

UV min	𝑇1	𝑇𝑚	𝑇2	𝜏	𝛿	𝜔	𝜇𝑔=𝛿/𝜔	Activation energy (E)	Frequency factor (s)
20 min UV	135	182	214	47	32	79	0.405	0.55	1×10^7
30 min UV	80	111	143	31	32	63	0.508	0.61	2×10^9
15 min UV	67	111	130	44	19	63	0.302	0.40	2×10^6
20 min UV	71	111	118	40	7	47	0.149	0.43	5×10^6
25 min UV	96	126	152	30	26	56	0.464	0.68	5×10^9