Photodissociation dynamics of the I2− anion using femtosecond photoelectron spectroscopy

✍ Scribed by B. Jefferys Greenblatt; Martin T. Zanni; Daniel M. Neumark

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 534 KB
• Volume: 258
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(96)00766-x

✦ Synopsis

The photodissociation dynamics of the 12 anion have been studied in real-time using femtosecond photoelectron spectroscopy. In this experiment, I~-is excited to a dissociative electronic state with an ultrafast pump pulse, and the photoelectron spectrum of the dissociating anion is measured by photodetachment with a second, ultrafast probe pulse. The variation of the photoelectron spectrum with delay time enables one to monitor the dissociating anion from the initial Franck-Condon region of excitation out to the asymptotic region. Dissociation occurs on a time scale of 100 fs. The results are compared with quantum mechanical simulations using previously published potential energy curves for I~-.