Figure 2
From: CO2 phonon mode renormalization using phonon-assisted energy up-conversion
Changes in absorption under UV irradiation.
(a) Absorption change at transition band R(30) (cold band 00001 → 00031) and band R(27e) (hot band 01101 → 01131) due to UV irradiation (λ = 213 nm) of CO2. The absorption maximum and minimum occurs at t = 1840 s and t = 9000 s, respectively. (b) Changes in absorption of the R branch for the 00001 → 00031 transition band at t = 1840 s and t = 9000 sec due to UV irradiation. (c) Changes in absorption of the P branch for the 00001 → 00031 transition band at t = 1840 s and t = 9000 s due to UV irradiation. (d) Changes in absorption of the hot transition band 01101 → 01131 at t = 1840 s and t = 9000 s due to UV irradiation. (e) Changes in the populations at the three energy levels n1, n2 and n3 with time, obtained by solving the rate equations.
