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Liang, C.-W.; Chen, C.-C.; Wei, C.-Y.; Chen, Y.-T., Two-photon resonant ionization spectroscopy of the allyl-h[sub 5] and allyl-d[sub 5] radicals: Rydberg states and ionization energies, J. Chem. Phys., 2002, 116, 10, 4162, https://doi.org/10.1063/1.1450553 . [all data]