A mini-TOF photofragment translational spectrometer – photofragmentation of CF 3I at 281.73 nm

• Published in: Chemical physics letters Vol. 400; no. 1; pp. 15 - 18
• Main Authors: Tian, Zhixin, Bi, Weibin, Deng, Huadong, Wang, Xu, Tang, Zichao, Zhu, Qihe
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 11.12.2004
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2004.10.071

Using a very weak electric field to accelerate the photofragment ions, we have constructed a very simple photofragment translational spectrometer with only a 50 mm total flight path, but we can get photofragment translational spectra with high resolution. On this apparatus, we have performed the photodissociation of CF 3I at 281.73 nm, and the same laser will ionize I*( 2P 1/2) via REMPI. Seven well-resolved vibrational peaks were obtained. Six of them are assigned to the umbrella vibrational mode v 2 = 0–5 states of photofragment CF 3. The average internal energy E ¯ int = 1928 cm - 1 is about 21% of the available energy.