Observation of multiphoton detachment of the H- ion
Abstract
We have observed nonresonant multiphoton electron detachment of H- ions in moderately intense (a few tens of GW/cm2) laser fields. A well-collimated beam of H- ions with an energy of 581 MeV was intersected by focused 10.6-μm radiation from a pulsed CO2 laser. The center-of-mass photon energy was tuned using the relativistic Doppler shift so that the minimum number of simultaneous photons required for electron detachment ranged from three to sixteen. Definite signals were observed for the minimum photon number ranging from three to eight. Our preliminary results show evidence for structure in the relative total cross section.
- Publication:
-
Physical Review A
- Pub Date:
- June 1989
- DOI:
- 10.1103/PhysRevA.39.6068
- Bibcode:
- 1989PhRvA..39.6068T
- Keywords:
-
- Carbon Dioxide Lasers;
- Hydrogen Ions;
- Multiphoton Absorption;
- Negative Ions;
- Photoionization;
- Pulsed Lasers;
- Detachment;
- Gas Ionization;
- Ion Beams;
- Laser Beams;
- Particle Energy;
- Atomic and Molecular Physics;
- 32.80.Rm;
- 32.80.Fb;
- Multiphoton ionization and excitation to highly excited states;
- Photoionization of atoms and ions