Laser induced fluorescence studies of UII produced by photoionization of uranium

Journal Article · Mon Jun 01 04:00:00 EDT 1981 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.441048· OSTI ID:6499332

Chen, H; Borzileri, C

Multiphoton ionization of uranium atoms followed by laser-induced fluorescence detection of uranium ions is used to study the initial electronic state distribution of photon-produced ions and the degree of ionization within the uranium vapor. Our experimental data clearly demonstrate that photoionization of uranium through the 50 701 cm/sup -1/ excited even levels using a broad band pulsed dye laser of 5915 A produces roughly 50% ground state ions and 50% metastably excited (289 cm/sup -1/) ions. The effective photoionization cross section is about 4.7 x 10/sup -17/ cm/sup 2/. The subsequent dispersion of UII after photoionization appears to be caused by ambipolar expansion of ions and electrons in the plasma. The gA values for the 4050 and 3859 A transitions of UII are measured to be 0.86 x 10/sup 8/ and 2.8 x 10/sup 8/ s/sup -1/, respectively.

• Research Organization: Lawrence Livermore National Laboratory, University of California, Livermore, California 94550
• OSTI ID: 6499332
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 74:11; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ACTINIDES
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUORESCENCE
IONIZATION
IONS
LASER RADIATION
LUMINESCENCE
METALS
METASTABLE STATES
PHOTOIONIZATION
RADIATIONS
URANIUM
URANIUM IONS