Abstract
This paper investigates the short-living absorption and the emission of CsI(Na) under a pulsed electron beam (e=0.25 MeV, t1/2=15 ns and W=0.003...0.16 J/cm2). The bands of singlet self-trapped excitons, as well as Na0 and Vk color centers have been detected in the transient absorption spectrum of CsI(Na). It has been found that the activator luminescence spectrum, peaking at 3.0 eV, fits a Gaussian (E m=3.0 eV and FWHM=0.44±0.02 eV at 80 K) and remains the same at different time delays within 10-810-3 s. The decay kinetics of the 3.0 eV emission has one nanosecond exponential component and two microsecond ones with time constants 1.0 and 3.0 μs, which remain unchanged within 78150 K. It is concluded that the activator emission is due to the radiative annihilation of sodium-perturbed two halide excitons from the non-relaxed singlet state. The pathways of such excitons creation are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 2579-2581 |
| Number of pages | 3 |
| Journal | Journal of Luminescence |
| Volume | 131 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 1 Dec 2011 |
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Keywords
- Cathode luminescence
- Color center
- Short-living absorption
- Sodium-doped cesium iodide
ASJC Scopus subject areas
- Biophysics
- Atomic and Molecular Physics, and Optics
- Chemistry(all)
- Biochemistry
- Condensed Matter Physics
Cite this
Short-living absorption and emission of CsI(Na). / Yakovlev, V.; Trefilova, L.; Meleshko, A.; Ganja, Yu.
In: Journal of Luminescence, Vol. 131, No. 12, 01.12.2011, p. 2579-2581.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Short-living absorption and emission of CsI(Na)
AU - Yakovlev, V.
AU - Trefilova, L.
AU - Meleshko, A.
AU - Ganja, Yu
PY - 2011/12/1
Y1 - 2011/12/1
N2 - This paper investigates the short-living absorption and the emission of CsI(Na) under a pulsed electron beam (e=0.25 MeV, t1/2=15 ns and W=0.003...0.16 J/cm2). The bands of singlet self-trapped excitons, as well as Na0 and Vk color centers have been detected in the transient absorption spectrum of CsI(Na). It has been found that the activator luminescence spectrum, peaking at 3.0 eV, fits a Gaussian (E m=3.0 eV and FWHM=0.44±0.02 eV at 80 K) and remains the same at different time delays within 10-810-3 s. The decay kinetics of the 3.0 eV emission has one nanosecond exponential component and two microsecond ones with time constants 1.0 and 3.0 μs, which remain unchanged within 78150 K. It is concluded that the activator emission is due to the radiative annihilation of sodium-perturbed two halide excitons from the non-relaxed singlet state. The pathways of such excitons creation are discussed.
AB - This paper investigates the short-living absorption and the emission of CsI(Na) under a pulsed electron beam (e=0.25 MeV, t1/2=15 ns and W=0.003...0.16 J/cm2). The bands of singlet self-trapped excitons, as well as Na0 and Vk color centers have been detected in the transient absorption spectrum of CsI(Na). It has been found that the activator luminescence spectrum, peaking at 3.0 eV, fits a Gaussian (E m=3.0 eV and FWHM=0.44±0.02 eV at 80 K) and remains the same at different time delays within 10-810-3 s. The decay kinetics of the 3.0 eV emission has one nanosecond exponential component and two microsecond ones with time constants 1.0 and 3.0 μs, which remain unchanged within 78150 K. It is concluded that the activator emission is due to the radiative annihilation of sodium-perturbed two halide excitons from the non-relaxed singlet state. The pathways of such excitons creation are discussed.
KW - Cathode luminescence
KW - Color center
KW - Short-living absorption
KW - Sodium-doped cesium iodide
UR - http://www.scopus.com/inward/record.url?scp=79960263982&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79960263982&partnerID=8YFLogxK
U2 - 10.1016/j.jlumin.2011.06.037
DO - 10.1016/j.jlumin.2011.06.037
M3 - Article
VL - 131
SP - 2579
EP - 2581
JO - Journal of Luminescence
JF - Journal of Luminescence
SN - 0022-2313
IS - 12
ER -