Negative ions photodetachment

The transition-state spectroscopy experiment based on negative-ion photodetachment described above is well suited to the study of the F + FI2 reaction. The experiment is carried out tln-ough measurement of the photoelectron spectrum of the anion FH,. This species is calculated to be stable with a binding energy of... 

Kitsopoulos T N, Chick C J, Zhao Y and Neumark D M 1991 Study of the low-lying electronic states of Sij and Si. using negative ion photodetachment techniques J. Chem. Phys. 95 1441... 

Weaver, A. and Neumark, D.M. (1991). Negative ion photodetachment as a probe of bimolecular transition states the F + H2 reaction, Faraday Discuss. Chem. Soc. 91, 5-16. 

Fig. 8.24. Interaction between fine structure in negative ion photodetachment induced by a strong magnetic field and a broad Feshbach resonance (after C.H. Greene [412]).

Figure A3.7.3. Principle of transition-state spectroscopy via negative-ion photodetachment.

R. B. Metz, S. E. Bradforth, and D. M. Neumark, Transition state spectroscopy of bimolec-ular reactions using negative ion photodetachment, Adv. Chem. Phys. 81 1 (1992). 

T.F. O Malley, Effect of long-range final-state forces on the negative-ion photodetachment cross section near threshold, Phys. Rev. 137 (1965) A1668. 

In the second group of reactions are those between dielectric gas molecules and photons, produced by deexcitation of excited species at high E/N (such as AB and B in Table I and more likely, excited species produced by recombination processes). Here, three types of processes can increase the number of free electrons in the gas dielectric photoionization of AB (processes 8a and 8b), photoionization of the negative ions (photodetachment, process 10), and Penning ionization (process 11a or 11b, due to excited species produced via 7 or 3b, respectively). Of course, photons can collide with the electrodes and inject new electrons into the gas dielectric in this way. 

D. M. Neumark, Transition-State Spectroscopy via Negative Ion Photodetachment , Acct. Chem. Res. 26, 33 (1993). 

Baird, J. K., Negative ion photodetachment and the electron effective mass in liquids, /. Chem. Phys., 79, 316,1983. 

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