Ground-state splitting of [ital S]-state ion Cm[sup 3+] in LaCl[sub 3]
- Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Department of Physics and Astronomy, University of Wisconsin at Eau Claire, Eau Claire, Wisconsin 54702 (United States)
We report optical-spectroscopic studies of the ground-state splitting of the nominal [ital S]-state ion Cm[sup 3+] in LaCl[sub 3]. A total splitting of 1.97[plus minus]0.05 cm[sup [minus]1] for the [sup 8]S[sub 7/2] ground state of this system has been measured for the first time. Both electric and magnetic dipole transitions were observed. Energy levels of all four Kramers doublets of the [sup 8]S[sub 7/2] manifold were resolved by means of the site-selective excitation and emission spectra of [sup 8]S[sub 7/2][leftrightarrow][sup 6]D[sub 7/2] and [sup 8]S[sub 7/2][leftrightarrow][sup 6]P[sub 5/2] transitions. Our results show that the lowest component of the ground manifold is a [mu]=5/2 state dominated by [ital M]=[vert bar][plus minus]7/2[r angle] in contrast to a previously reported [mu]=1/2 state. The crystal-field model, established through analyzing optical spectra of the excited states, predicts a ground-state splitting with the right ordering but greater magnitude. In comparison with the lanthanide [ital S]-state ion Gd[sup 3+], much stronger spin--orbit coupling and reduced electrostatic interaction in concert with greater crystal field interaction significantly influence the characteristics of the ground state of the actinide [ital S]-state ion. Contributions from within the 5[ital f][sup 7] configuration account for most of the observed splitting.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6299863
- Journal Information:
- Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 99:5; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360606* -- Other Materials-- Physical Properties-- (1992-)
CATIONS
CHARGED PARTICLES
CHLORIDES
CHLORINE COMPOUNDS
COULOMB FIELD
COUPLING
CRYSTAL FIELD
CURIUM IONS
DIPOLES
DOPED MATERIALS
ELECTRIC DIPOLES
ELECTRIC FIELDS
ENERGY LEVELS
GROUND STATES
HALIDES
HALOGEN COMPOUNDS
INTERMEDIATE COUPLING
IONS
L-S COUPLING
LANTHANUM CHLORIDES
LANTHANUM COMPOUNDS
LINE WIDTHS
MAGNETIC DIPOLES
MATERIALS
MATRIX ISOLATION
MULTIPOLES
RARE EARTH COMPOUNDS
S STATES
SPECTROSCOPY