1. Photodetachment study of the1s3s4s4Sresonance in He−
- Author
-
Igor Yu. Kiyan, Christopher W. Ingram, G. Haeffler, U. Berzinsh, A. E. Klinkmüller, Dag Hanstorp, D. J. Pegg, and James R. Peterson
- Subjects
Physics ,Helium ions ,Ionization ,Resonance ,High resolution ,Sensitivity (control systems) ,Atomic physics ,Feshbach resonance ,Atomic and Molecular Physics, and Optics ,Energy (signal processing) ,Ion - Abstract
A Feshbach resonance associated with the 1s3s4s{sup 4}S state of He{sup {minus}} has been observed in the He(1s2s{sup 3}S)thinsp+thinspe{sup {minus}}({epsilon}s) partial photodetachment cross section. The residual He(1s2s{sup 3}S) atoms were resonantly ionized and the resulting He{sup +} ions were detected in the presence of a small background. A collinear laser-ion beam apparatus was used to attain both high resolution and sensitivity. We measured a resonance energy E{sub r}=2.959thinsp255(7) eV and a width {Gamma}=0.19(3) meV, in agreement with a recent calculation. {copyright} {ital 1997} {ital The American Physical Society}
- Published
- 1997
- Full Text
- View/download PDF