Variation of 5d-level position and emission properties of BaF{sub 2}:Pr crystals

Journal Article · Tue Nov 15 04:00:00 EST 2005 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.72.195112· OSTI ID:20719826

Rodnyi, P A ^[1]; Stryganyuk, G B ^[2]; Eijk, C W.E. van ^[3]; Voloshinovskii, A S ^[4]

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1. St. Petersburg State Polytechnical University, Polytekhnicheskaya 29, 195251 St. Petersburg (Russian Federation)
2. HASYLAB at DESY, Notkestr. 85, 22607 Hamburg (Germany)
3. Delft University of Technology, Mekelweg 15, 2629 JB Delft (Netherlands)
4. Ivan Franko National University of Lviv, Kirilo i Mefodii 8, 290005 Lviv (Ukraine)

The emission and excitation spectra of BaF{sub 2} doped with 0.3 and 3.0 mol % Pr{sup 3+} have been studied using synchrotron radiation in the range from 5 to 30 eV. In BaF{sub 2}:Pr{sup 3+} (0.3 mol %) the lowest level of the 4f5d configuration of Pr{sup 3+} is located at 5.55 eV relative to the {sup 3}H{sub 4},4f ground state. The {sup 1}S{sub 0},4f level lies higher, at 5.77 eV. Consequently the crystal shows two types of the Pr{sup 3+} emissions, one related to 5d{yields}4f transitions with a decay constant of 22 ns, another related to slow transitions from the {sup 3}P{sub 0} level. In BaF{sub 2}:Pr{sup 3+} (3.0 mol %) the lowest 5d state lies at 6.0 eV, that is above the {sup 1}S{sub 0} level. At 10 K the crystal shows cascade emission, i.e., {sup 1}S{sub 0}{yields}{sup 1}I{sub 6} transitions followed by transitions from the {sup 3}P{sub 0} level. At room temperature the second step of the cascade is quenched. It is shown that the energy shift of the 5d state as a function of Pr{sup 3+} concentration is due to the formation of Pr{sup 3+}-based clusters at higher concentrations.

• OSTI ID: 20719826
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 19 Vol. 72; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
BARIUM FLUORIDES
CRYSTALS
DECAY
DOPED MATERIALS
EV RANGE
EXCITATION
EXCITED STATES
GROUND STATES
PHOTOEMISSION
PRASEODYMIUM IONS
QUENCHING
SYNCHROTRON RADIATION
VARIATIONS