Determination of kinetic energy release for direct photodissociation process by one-dimensional TOF photofragment translational spectroscopy
✍ Scribed by Hyun Jin Hwang; Mostafa A. El-Sayed
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 474 KB
- Volume
- 170
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
A simple method is developed for the measurement of the most probable recoil velocity of photofragments produced from direct (fast, nonstatistical) photodissociation of neutral molecules. The time-of-flight (TOF) distribution of photoions, produced by a linearly polarized laser, is measured in a pulsed-acceleration TOF mass spectrometer with a small detection sohd angle, in which a delay time is introduced between the photolysis laser and the acceleration voltage pulses. From the delay time dependence of the TOF peak positions of I+, the most probable recoil velocity of the ground electronic state of the iodine produced in 266 nm photodissociatton of C2HsI is determined, which agrees wtth the value determined by high resolutton TOF photofragment translational spectroscopy within 2%