✦ LIBER ✦

Photofragmentation dynamics of H2O2 at 193 nm

✍ Scribed by Axel Ulrich Grunewald; Karl-Heinz Gericke; Franz Josef Comes

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 627 KB
Volume: 132
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(86)80092-6

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✦ Synopsis

The photofragmentation dynamics of Hz02 at 193 nm have been analyzed by probing the OH products by Doppler spectroscopy Using laser-induced fluorescence. The excess energy (Eav = 4 17 kJ/mol) appears mostly as translational motion of the fragments with ft = 0.84. No vibrational excitation was observed cfv < 0.003). The rotational state distribution is strongly inverted, peaking for N" = 12 which results in fr = 0.16. Our results indicate that previously published rotational state distributions are not nascent in character, but are perturbed by rotational relaxation. Individual fragment recoil velocities obtained from Doppler lineshapes are u = 4950 m s-l [OH(N" = 4)] and v = 4550 m s-l [OH(N" = lo)]. The effective anisotropy parameter Peff is slightly negative at high N" (Jeff = 0.35 at N" = 10).

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