Photoluminescence studies of deep traps in GaP:Ni
Journal of Physics C: Solid State Physics 12:21 (1979)
Abstract:
Transition metal impurities act as deep trapping centres in III-V and II-VI compounds and give rise to near-infrared absorption and luminescence. In many cases the charge state of the ion participating in these optical transitions is either unknown or the subject of some controversy. Luminescence studies of GaP:Ni are described. Measurements of polarised spectra under application of uniaxial stress support the assignment of the charge state Ni+ (d9).Energy levels in PrVO4
Journal of Physics C: Solid State Physics 11:14 (1978) 3059-3069
Abstract:
Investigations of the low-lying energy levels of PrVO4 using fluorescence, Raman and far infrared spectroscopy give the energies of the first excited singlet and doublet as about 35 cm-1 and 84 cm-1, respectively, above the ground singlet. Detailed measurements of the nuclear magnetic resonance spectrum of 141Pr show that the temperature variation up to 20K of the spin-Hamiltonian parameters gamma /sub ///, gamma perpendicular to and P can be accurately fitted by thermal averages over these three levels. The positions of the remaining levels of the 3H4 manifold are estimated by an extrapolation procedure based on properties of a crystal field Hamiltonian with tetragonal symmetry.EXPERIMENTAL AND THEORETICAL STUDIES OF EFFECTS OF ANHARMONICITY AND HIGH-TEMPERATURE DISORDER ON RAMAN-SCATTERING IN FLUORITE CRYSTALS
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 360:1702 (1978) 317-345
RAMAN AND INFRARED-SPECTRA OF TIGASE2
PHYSICA STATUS SOLIDI B-BASIC RESEARCH 88:1 (1978) K5-K9
VACUUM FURNACE FOR OPTICAL SPECTROSCOPY
JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS 11:6 (1978) 517-520