Table 3. Rate Constants, Their Meanings, and Values Adopted in the Calculations.

rate constanta	meaning	value 300 K	value 10 K
Q	S0 → S1 excitation	10	10
a	T1 → S0 nonradiative and radiative decay	1E6	1E2
b	S1 → S0 fluorescence decay	3E8	3E8
f	S1 → T1 intersystem crossing	1E9	1E9
c	5D0 → 7FJ luminescence	5000	3906
g	S1 → S07F0 → DJ energy transfer	1E9	1E9
k	S1 → S07F0 → 5D1 energy transfer	1.1E8	1.1E4
m	S1 → S07F0 → 5D0 energy transfer	1.17E6	4.6E5
n	T1 → S07F0 → 5D1 energy transfer	3.33E7	2.84E7
p	T1 → S0 F0 → 5D0 energy transfer	1.5E7	1.5E7
s	DJ → 5D1 internal conversion	1E8	1E8
d	5D1 → 5D0 internal conversion	2.5E6	2.5E5
u	5D1 → 7FJ luminescence	1E4	1.5E5

^aUnit s^–1 or mol^–1 s^–1.