Table 1. The fitted coefficients A ₂ and A ₄, as mentioned in the text, for each temperature.

Temperature	A2[(ps)2(μm)−1]	A4[(ps)4(μm)−1]
300 K	1.13	0.76
300 K	1.25	1.05
280 K	0.79	0.91
260 K	0.57	1.23
240 K	0.56	0.81
220 K	0.78	0.76
200 K	1.16	0.65
180 K	0.87	1.07
160 K	0.95	1.14

The values in bold type come from different set of measurements.