Abstract
Spectral-kinetics properties of photo-scintillation excited with single light pulses of a nitrogen laser (λ=337.1 nm, t 1/2=5 ns, Q=1 mJ) have been studied in CsI:Eu crystals at temperature within 80-300 K. It is found that the exponential decay of 463 nm emission band has a time constant which grows from 0.85 μs at 78 K to 1.6 μs at 380 K. Such an anomalous temperature behavior of 463 nm emission decay kinetics is discussed in terms of the crystal thermal expansion. It has been proposed that 463 nm emission is caused by a cluster center consisting of three dipoles Eu 2v c - bounded with each other in a hexagon. Owing to the exchange resonance in the cluster, the energy passes from an excited dipole to a non-excited one and the distance between them gets longer due to thermal expansion of the crystal.
| Original language | English |
|---|---|
| Pages (from-to) | 2476-2478 |
| Number of pages | 3 |
| Journal | Journal of Luminescence |
| Volume | 132 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1 Sep 2012 |
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Keywords
- Cluster
- Europium-doped cesium iodide
- Luminescence
ASJC Scopus subject areas
- Biophysics
- Chemistry(all)
- Atomic and Molecular Physics, and Optics
- Biochemistry
- Condensed Matter Physics
Cite this
Luminescence of Eu 2-v c - dipoles and their associates in CsI : Eu crystals. / Yakovlev, V.; Trefilova, L.; Meleshko, A.; Ovcharenko, N.
In: Journal of Luminescence, Vol. 132, No. 9, 01.09.2012, p. 2476-2478.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Luminescence of Eu 2-v c - dipoles and their associates in CsI
T2 - Eu crystals
AU - Yakovlev, V.
AU - Trefilova, L.
AU - Meleshko, A.
AU - Ovcharenko, N.
PY - 2012/9/1
Y1 - 2012/9/1
N2 - Spectral-kinetics properties of photo-scintillation excited with single light pulses of a nitrogen laser (λ=337.1 nm, t 1/2=5 ns, Q=1 mJ) have been studied in CsI:Eu crystals at temperature within 80-300 K. It is found that the exponential decay of 463 nm emission band has a time constant which grows from 0.85 μs at 78 K to 1.6 μs at 380 K. Such an anomalous temperature behavior of 463 nm emission decay kinetics is discussed in terms of the crystal thermal expansion. It has been proposed that 463 nm emission is caused by a cluster center consisting of three dipoles Eu 2v c - bounded with each other in a hexagon. Owing to the exchange resonance in the cluster, the energy passes from an excited dipole to a non-excited one and the distance between them gets longer due to thermal expansion of the crystal.
AB - Spectral-kinetics properties of photo-scintillation excited with single light pulses of a nitrogen laser (λ=337.1 nm, t 1/2=5 ns, Q=1 mJ) have been studied in CsI:Eu crystals at temperature within 80-300 K. It is found that the exponential decay of 463 nm emission band has a time constant which grows from 0.85 μs at 78 K to 1.6 μs at 380 K. Such an anomalous temperature behavior of 463 nm emission decay kinetics is discussed in terms of the crystal thermal expansion. It has been proposed that 463 nm emission is caused by a cluster center consisting of three dipoles Eu 2v c - bounded with each other in a hexagon. Owing to the exchange resonance in the cluster, the energy passes from an excited dipole to a non-excited one and the distance between them gets longer due to thermal expansion of the crystal.
KW - Cluster
KW - Europium-doped cesium iodide
KW - Luminescence
UR - http://www.scopus.com/inward/record.url?scp=84861169876&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861169876&partnerID=8YFLogxK
U2 - 10.1016/j.jlumin.2012.04.026
DO - 10.1016/j.jlumin.2012.04.026
M3 - Article
VL - 132
SP - 2476
EP - 2478
JO - Journal of Luminescence
JF - Journal of Luminescence
SN - 0022-2313
IS - 9
ER -