Absorption Spectra and Energy Levels of Sm3+:Y3Al5O12.
Abstract
Absorption spectra between O.2 and 6.7 micrometer are reported for trivalent samarium in single-crystal yttrium aluminum garnet, Y3Al5O12, at liquid nitrogen, and room temperatures. Energy levels (4f5SLj) associated with sextet, quartet, and doublet states of Sm3+2 are established from data between 1,500 and 46,000 cm. Most samarium ions occupy yttrium ion sites, which have D2 point-group symmetry in the lattice. A free-ion wavefunction calculation predicts the assignment of 35 isolated SLj manifolds with an rms deviation of 32 cm between calculated and observed centers of gravity. A Hamiltonian consisting of coulombic, spin-orbit, and crystalline electric field (D2 symmetry) terms is diagonalized for the two lowest sextet states 6Hj and 6Fj. The calculated Stark levels based on a single set of Kkm crystal field parameters are compared to the observed levels (54), yielding an rms deviation of 4.9 cm. Keywords: Spectra, rare earth, samarium, yttrium, alumimum.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1987
- Accession Number
- ADA180746
Entities
People
- Clyde A. Morrison
- John B. Bruber
- Marian E. Hills
- Melvin P. Nadler
- Milan R. Kokta
Organizations
- Harry Diamond Laboratories