Time constants of the exponential components of the PL decay of Bi-free and Bi-loaded PVK-based plastic scintillators.

Sample	Decay time constant		χ 2
	τ 1 [ns]	τ 2 [ns]
Bi 0 wt%	1.8 (99%)	12 (1%)	1.2
Bi 5 wt%	1.5 (99%)	9.1 (1%)	1.0
Bi 10 wt%	1.5 (99%)	8.7 (1%)	0.85
Bi 15 wt%	1.4 (99%)	7.0 (1%)	0.77