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Photodissociation of MgC60+ complexes generated and stored in a linear ion trap

✍ Scribed by M. Welling; R.I. Thompson; H. Walther

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
489 KB
Volume
253
Category
Article
ISSN
0009-2614

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✦ Synopsis

This Letter presents a general technique for the determination of absolute photodissociation cross-sections of ionic molecular complexes in the gas phase. Experiments on MgC~o complexes were used to demonstrate the effectiveness of this approach. The complexes were generated collisionally inside a linear ion trap, and stored for periods of 30 s or longer during which laser induced photodissociation measurements were carded out. The dissociation rates were determined using either a mass spectrometric or a fluorescence technique, and were found to have a linear dependence on incident laser powers up to 50 mW (~ 300 W/cm 2 intensity). The total photodissociation cross-sections increase from 10-18 to 10-16 cm 2 for photon energies ranging from 1.96 to 4.46 eV.

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