The time constant for the collisional deactivation of the υ = 1 vibrational level of N2is found to be 1.5 ± 0.5 s in liquid nitrogen of 99.9995% purity of 78 K. This result is consistent with a simple binary collision theory of vibrational relaxation for liquids. © 1974.
Calaway, W. F., & Ewing, G. E. (1975). Vibrational relaxation in liquid nitrogen. Chemical Physics Letters, 30(3), 485–489. https://doi.org/10.1016/0009-2614(75)80037-6