The 2C-R2PI spectrum, presented in Fig. , is in good agreement with the spectrum acquired by Gengeliczki et al using ns 266 nm ionization. That previous 2C-R2PI spectrum for 9H 2,6-dAP becomes very diffuse with no clear peaks at excess energies higher than ~250 cm -1 . This cut-off value is in line with the faster dynamics that we observed in our measurements since the ionization efficiency decreases when the excited state lifetime becomes shorter than the pulse width of the ionization laser. We also performed a nanosecond pump-probe measurement at the origin peak, deriving a lifetime of 6.3 ns. We assume that this nanosecond decay pathway exists for the first three peaks (+0, +73, +110 cm -1 ), where the spectrum is still sharp. Broadening of higher energy peaks in the spectrum indicates that the photorelaxation of 9H 2,6-dAP occurs on a much faster timescale with excess energy above 180 cm -1 . This conclusion is also supported by much shorter picosecond time constants derived by fitting the pump-probe data for the three rightmost peaks presented in Fig. , namely 33.4 ps, 33.6 ps and 12.0 ps. As we move to higher energies above the origin transition in the 2C-R2PI spectrum for 9H 2,6-dAP, the lifetime becomes progressively shorter. Starting at the origin, the first few peaks have lifetimes on the order of 750 ps, in addition to the ns component found earlier. These photodeactivation time constants are significantly larger than for adenine and 2AP. We found that the lifetime quickly drops to ~35 ps beyond about 180 cm -1 excess energy for 9H 2,6-dAP. The last notably large and discrete peak, at +790 cm -1 has a lifetime no longer than 12 ps. The picosecond excited-state decays are most likely associated with radiationless deactivation pathways. Meanwhile, the nanosecond decay might originate from a fluorescence pathway.