, and 𝐶 ̃ Σ 𝑔 + 2 states reached by ionization energies of 13.778 eV, 17.314 eV, 18.077 eV, and 19.394 eV, respectively. In our experiment, an XUV pulse predominantly excites CO2 into neutral Rydberg states located between 17.3 -18.1 eV. An energy level diagram depicting the XUVexcited states relevant to this experiment is provided in Fig. . This spectral region of CO2 contains contributions from the Henning diffuse and Henning sharp series, both of which converge to the ionic 𝐵 ̃ Σ 𝑢 + 2 threshold, as well as the Tanaka-Ogawa series, which converges to the ionic 𝐴 ̃ Π 𝑢 2 threshold . The two Henning series dominate the photoabsorption spectrum as contributions from the Tanaka-Ogawa series are limited to higher-lying n and 𝜈 1 members in the spectral region above the 𝐴 ̃ Π 𝑢 2 limit examined here. Complementary experiments by Sandhu and co-workers probing the dynamics of the Tanaka-Ogawa series are currently underway .