Measurement of the absolute cross section for multiphoton ionization of atomic hydrogen at 248 nm
Conference
·
OSTI ID:6784900
We present measurements of the absolute rates for multiphoton ionization of the ground state from atomic hydrogen by a linearly polarized, subpicosecond KrF laser pulse at a wavelength of 248 nm. A laser crossed atomic beam technique is used. The irradiance was varied from 3{times}10{sup 12} w/cm{sup 2} to 2{times}10{sup 14} w/cm{sup 2} and three above threshold ionization peaks were observed. The measured rate for total electron production is less than predicted by the numerical and perturbation calculations, but significantly higher than calculated by the Reiss and Keldysh methods. 21 refs., 7 figs.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6784900
- Report Number(s):
- LA-UR-90-3210; CONF-900926-1; ON: DE91000222
- Resource Relation:
- Conference: 5. international conference on multiphoton processes, Paris (France), 24-28 Sep 1990
- Country of Publication:
- United States
- Language:
- English
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