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Experimental data showing the decreases in column density of pyrimidine (Npyr) derived from the ∼1406 cm−1 bands in the IR spectra measured for the samples irradiated with (a) the 0th order beam light and (b) the He ii line, as well as the two-component first-order exponential decay fits of these photo-destruction curves of pyrimidine following Eq. 2. The resulting fitting parameters for these curves are given in Table 3.
