Abstract
Nanosecond-resolution absorption spectroscopy at room temperature was used to study the laws governing the creation and evolution of the primary defect structure in CaF2, SrF2, and BaF2 crystals exposed to an accelerated electron pulse. It is shown that the spectral-kinetic characteristics of self-trapped excitons created in undamaged parts of the crystal lattice are qualitatively similar. Partial polarization of the absorption of self-trapped excitons is observed in CaF2. The structure of the transient absorption spectra becomes more complex in the sequence CaF2, SrF2, BaF2 because of the formation of excitons trapped in phase inclusions of homologous cationic impurities. The spectral characteristics of excitons trapped in undamaged parts of the CaF2 and SrF2 lattice and in their phase inclusions in BaF2 are the same although the latter have a considerably shorter relaxation time. Short-lived (τ ≤ 100 ns) absorption of unknown defects was observed in the spectral range ≥ 5 eV.
| Original language | English |
|---|---|
| Pages (from-to) | 1119-1124 |
| Number of pages | 6 |
| Journal | Physics of the Solid State |
| Volume | 40 |
| Issue number | 7 |
| Publication status | Published - Jul 1998 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Time-resolved spectroscopy of self-trapped excitons in fluorides of alkaline-earth metals under pulsed electron irradiation. / Shtan'ko, V. F.; Chinkov, E. P.
In: Physics of the Solid State, Vol. 40, No. 7, 07.1998, p. 1119-1124.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Time-resolved spectroscopy of self-trapped excitons in fluorides of alkaline-earth metals under pulsed electron irradiation
AU - Shtan'ko, V. F.
AU - Chinkov, E. P.
PY - 1998/7
Y1 - 1998/7
N2 - Nanosecond-resolution absorption spectroscopy at room temperature was used to study the laws governing the creation and evolution of the primary defect structure in CaF2, SrF2, and BaF2 crystals exposed to an accelerated electron pulse. It is shown that the spectral-kinetic characteristics of self-trapped excitons created in undamaged parts of the crystal lattice are qualitatively similar. Partial polarization of the absorption of self-trapped excitons is observed in CaF2. The structure of the transient absorption spectra becomes more complex in the sequence CaF2, SrF2, BaF2 because of the formation of excitons trapped in phase inclusions of homologous cationic impurities. The spectral characteristics of excitons trapped in undamaged parts of the CaF2 and SrF2 lattice and in their phase inclusions in BaF2 are the same although the latter have a considerably shorter relaxation time. Short-lived (τ ≤ 100 ns) absorption of unknown defects was observed in the spectral range ≥ 5 eV.
AB - Nanosecond-resolution absorption spectroscopy at room temperature was used to study the laws governing the creation and evolution of the primary defect structure in CaF2, SrF2, and BaF2 crystals exposed to an accelerated electron pulse. It is shown that the spectral-kinetic characteristics of self-trapped excitons created in undamaged parts of the crystal lattice are qualitatively similar. Partial polarization of the absorption of self-trapped excitons is observed in CaF2. The structure of the transient absorption spectra becomes more complex in the sequence CaF2, SrF2, BaF2 because of the formation of excitons trapped in phase inclusions of homologous cationic impurities. The spectral characteristics of excitons trapped in undamaged parts of the CaF2 and SrF2 lattice and in their phase inclusions in BaF2 are the same although the latter have a considerably shorter relaxation time. Short-lived (τ ≤ 100 ns) absorption of unknown defects was observed in the spectral range ≥ 5 eV.
UR - http://www.scopus.com/inward/record.url?scp=0032336279&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032336279&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0032336279
VL - 40
SP - 1119
EP - 1124
JO - Physics of the Solid State
JF - Physics of the Solid State
SN - 1063-7834
IS - 7
ER -