1. At our request, D. W. Ball checked his original spectra from thermal Al + NO experiments and found a weak band at 1644 cm-1in the water region and weak bands at 566 and 510 cm-1in the region made very noisy by the ZnSe optical cutoff. Although it is difficult to compare band absorbances recorded under different experimental conditions, the relative intensities of the 1644, 1282, 566, and 510 cm-1bands in the thermal and laser-ablated Al + NO experiments appear to be approximately the same. No absorption was observed at 1079, 1075 cm-1in the thermal study.
2. Reactions of pulsed-laser evaporated aluminum atoms with oxygen: infrared spectra of the reaction products in solid argon