Electron affinity of Li: A state-selective measurement
- Department of Physics, Goeteborg University and Chalmers University of Technology, S-41296 Goeteborg (Sweden)
- Department of Physics, University of Tennessee, Knoxville, Tennessee 37996 (United States)
We have investigated the threshold of photodetachment of Li{sup {minus}} leading to the formation of the residual Li atom in the 2{ital p}{sup 2}{ital P} state. The excited residual atom was selectively photoionized via an intermediate Rydberg state and the resulting Li{sup +} ion was detected. A collinear laser-ion beam geometry enabled both high resolution and sensitivity to be attained. We have demonstrated the potential of this state-selective photodetachment spectroscopic method by improving the accuracy of Li electron affinity measurements an order of magnitude. From a fit to the Wigner law in the threshold region, we obtained a Li electron affinity of 0.618049(20) eV. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 284327
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 53; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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