Mn2(CO)10 was photolysed in the gas phase by the XeCl-excimer laser with fluence in the range 25–300 mJ/cm2 and a dye laser. The UV/VIS emission of the products was probed on a nanosecond time scale. The emission from excited states of metal atoms was detected only. The Mn atoms are predominantly formed in their ground statea 6 S 2 1/2. The absorption of one photon and the subsequent relaxation process leads to the formation ofz 6 P J 0 (J = 11/2, 21/2, 31/2) states and emission of photons at a wavelength of 403 nm. The formation of the excited statese 8 D 5 1/2,z 6 F 4 1/2 0 ande 6 D 4 1/2 and the subsequent emission observed at wavelengths of 357, 383 and 446 nm requires the absorption of two photons by the ground-state Mn atoms. In addition, transition from thea 6 D j (J = 11/2, 21/2) lower states were observed in the wavelength-resolved Laser-Induced Fluorescence (LIF) spectra.
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Kubát, P., Krhút, J., Vondrák, T. et al. Pulsed-laser photolysis of Mn2(CO)10: A time-resolved fluorescence study. Appl. Phys. B 62, 169–171 (1996). https://doi.org/10.1007/BF01081121