Inefficient Vibrational Cooling of C₆₀ in a Supersonic Expansion

Table 4

Hard sphere radii used to compute the mean free path of molecules in the supersonic expansion.

Species	Radius (Å)
Ar	1.88
C60	5.0
Pyrene	4.0
Anthracene	3.8
Tetracene	4.2
Pentacene	4.6
Ovalene	5.1