Photoelectron angular distributions for cesium, rubidium, and sodium atoms using multiphoton ionization

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5683022

Dodhy, A

Photoelectron angular distributions were investigated in cesium, rubidium, and sodium atoms using resonant and nonresonant multiphoton excitation techniques. The experiments were carried out by using a frequency-tunable dye laser as the excitation light source and a spherical sector electrostatic energy analyzer in conjunction with a dual channel plate detector. Photoelectron angular distribution measurements were performed for two-photon resonant, three photon ionization via the nd /sup 2/D states in cesium (n = 15-23), rubidium (n = 11-23), and sodium (n = 6-9) atoms. In all three cases, the j = 3/2 and j = 5/2 fine-structure levels of the nd /sup 2/D states were excited coherently, which could then couple with each other during the time that the laser pulse was on. The effect of this fine-structure coupling on the photoelectron angular distributions is reported. Photoelectron angular distributions were investigated for two-photon nonresonant ionization of cesium and rubidium atoms. These measurements were carried out as a function of the laser excitation wavelength in a region near the two-photon ionization threshold. Results of angular distributions for photoelectrons with kinetic energy in the range of approx. =25-100 MeV are reported.

• Research Organization: Auburn Univ., AL (USA)
• OSTI ID: 5683022
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ANGULAR DISTRIBUTION
CESIUM
DISTRIBUTION
DYE LASERS
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
EXCITATION
FERMIONS
IONIZATION
LASERS
LEPTONS
LIGHT SOURCES
LIQUID LASERS
METALS
PHOTOEMISSION
PHOTOIONIZATION
RADIATION SOURCES
RUBIDIUM
SECONDARY EMISSION
SODIUM