Polarized absorption spectra and energy levels for U/sup 3 +/(5f/sup 3/) in LaCl/sub 3/

Journal Article · Thu Nov 15 04:00:00 EST 1979 · J. Chem. Phys.; (United States)

OSTI ID:5757730

Gruber, J B; Morrey, J R; Carter, D G

Polarized absorption spectra covering the wavelength range 5600 to 25 000 A are reported for U/sup 3 +/(5f /sup 3/) doped into single crystal LaCl/sub 3/. Spectra were recorded at liquid helium, liquid nitrogen, and at room temperatures. Temperature-dependent polarized spectra help establish many crystalline electric-field (CEF) split J levels not directly excited from the ground state due to selection rules for C/sub 3h/ symmetry. Analysis of the data confirms the earlier (1959) assignments made by S. P. Cook at The Johns Hopkins University to the ground state manifold Stark levels. For /sup 4/I/sub 9/2/, the ground state manifold, we find: ..mu.. ( +- 5/2) =0, ..mu.. ( +- 1/2) =210, ..mu.. ( +- 3/2) =241, ..mu.. ( +- 5/2) =440, and ..mu.. ( +- 3/2) =458 all in energy units of cm/sup -1/. Uncertainty in establishing these levels is within several wave numbers and involves over 150 temperature-dependent transitions.

• Research Organization: Department of Physics, College of Science and Mathematics, North Dakota State University, Fargo, North Dakota 58105
• OSTI ID: 5757730
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 71:10; 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
ABSORPTION SPECTRA
ACTINIDE ALLOYS
ALLOYS
ATOMIC IONS
CHARGED PARTICLES
CHLORIDES
CHLORINE COMPOUNDS
ENERGY LEVELS
HALIDES
HALOGEN COMPOUNDS
IONS
LANTHANUM CHLORIDES
LANTHANUM COMPOUNDS
POLARIZATION
RARE EARTH COMPOUNDS
SPECTRA
TEMPERATURE DEPENDENCE
ULTRAVIOLET SPECTRA
URANIUM ADDITIONS
URANIUM ALLOYS
URANIUM IONS
VISIBLE SPECTRA