Time-resolved luminescence spectroscopy of ultrafast emissions in BaGeF6

2022 ◽  
pp. 118729
Author(s):  
Juhan Saaring ◽  
Alexander Vanetsev ◽  
Kirill Chernenko ◽  
Eduard Feldbach ◽  
Irina Kudryavtseva ◽  
...  
Keyword(s):  
Luminescence Spectroscopy ◽  
Time Resolved

Techniques in Time-Resolved Luminescence Spectroscopy

1984 ◽  
pp. 393-407 ◽  
Author(s):  
D.L. ROSEN ◽  
A.G. DOUKAS ◽  
A. KATZ ◽  
Y. BUDANSKY ◽  
R.R. ALFANO
Keyword(s):  
Luminescence Spectroscopy ◽  
Time Resolved

scholarly journals Luminescence of uranium(VI) after liquid-liquid extraction from HCl by Aliquat® 336 in n-dodecane:1-decanol by time-resolved laser-induced luminescence spectroscopy

2020 ◽  
Vol 108 (7) ◽  
pp. 527-533 ◽  
Author(s):  
Pascal E. Reiller ◽  
Clarisse Mariet
Keyword(s):  
Organic Phase ◽  
Decay Time ◽  
Specific Interaction ◽  
Intensity Variation ◽  
Pitzer Model ◽  
Luminescence Spectroscopy ◽  
Luminescence Spectra ◽  
Time Resolved ◽  
Crystal Field Effect ◽  
Hcl Concentration

AbstractTo investigate the extraction of uranium(VI) in HCl media by Aliquat® 336 in 1:99 (v:v) 1-decanol:n-dodecane mixture, our objective is to identify the complexe(s) in the organic phase by time-resolved laser-induced luminescence spectroscopy (TRLS). The extraction mechanism is supposed to involve the formation of $[U{O_2}Cl_4^{2 - } \cdot {({R_4}{N^ + })_2}]$ in the organic phase. The occurrence of such a species leads to the presence of the ${\rm{U}}{{\rm{O}}_2}{\rm{Cl}}_4^{2 - }$ species in the organic solution, which luminescence shows particular features. The luminescence spectra and decay time evolutions are obtained in the organic phase as a function of HCl concentration in the aqueous phase (0.5–6 M). The extraction of ${\rm{U}}{{\rm{O}}_2}{\rm{Cl}}_4^{2 - }$ is confirmed by the particular spectrum of uranium(VI) in the organic phase, and the typical splitting of the luminescence bands, due to the crystal field effect, is clearly evidenced. The stoichiometry is verified using luminescence intensity variation as a function of the activity of Cl−, and extraction constants are calculated both using the specific interaction theory and Pitzer model. A decomposition of the spectrum of the extracted complex in the organic phase is also proposed. The decay time variation as a function of temperature allows estimating the activation energy of the luminescence process of the extracted complex.

A time-resolved luminescence spectroscopy study of non-linear optical crystals K2Al2B2O7

2012 ◽  
Vol 132 (7) ◽  
pp. 1632-1638 ◽  
Author(s):  
I.N. Ogorodnikov ◽  
V.A. Pustovarov ◽  
S.A. Yakovlev ◽  
L.I. Isaenko ◽  
S.A. Zhurkov
Keyword(s):  
Luminescence Spectroscopy ◽  
Spectroscopy Study ◽  
Time Resolved ◽  
Optical Crystals ◽  
Non Linear ◽  
Linear Optical

scholarly journals Time-resolved luminescence spectroscopy by the optical Kerr-gate method applicable to ultrafast relaxation processes

2000 ◽  
Vol 62 (15) ◽  
pp. 10083-10087 ◽  
Author(s):  
J. Takeda ◽  
K. Nakajima ◽  
S. Kurita ◽  
S. Tomimoto ◽  
S. Saito ◽  
...  
Keyword(s):  
Luminescence Spectroscopy ◽  
Relaxation Processes ◽  
Time Resolved ◽  
Ultrafast Relaxation ◽  
Optical Kerr Gate

scholarly journals Time- and Temperature-Dependent Luminescence of Manganese Ions in Ceramic Magnesium Aluminum Spinels

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 420
Author(s):  
Nicholas Khaidukov ◽  
Angela Pirri ◽  
Maria Brekhovskikh ◽  
Guido Toci ◽  
Matteo Vannini ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Broad Band ◽  
Solid State Reaction Method ◽  
Luminescence Spectroscopy ◽  
Luminescence Spectra ◽  
Manganese Ions ◽  
Time Resolved ◽  
Synthesis Conditions ◽  
Magnesium Aluminum Spinel

Samples of magnesium aluminum spinel ceramics doped with manganese ions were prepared by a high-temperature solid-state reaction method; their potential as red-emitting phosphors was analyzed using a time-resolved luminescence spectroscopy technique, from room temperature to 10 K. It was found that in the red spectral range, the luminescence spectra of manganese ions in the MgAl2O4 spinel showed a narrow band peaking at 651 nm due to the emission of Mn4+ and a broader emission band in the region of 675 ÷ 720 nm; the ratio of intensities for these bands depends on the synthesis conditions. By applying a special multi-step annealing procedure, the MgAl2O4:Mn4+ phosphor containing only tetravalent manganese ions, Mn4+, was synthesized. Broad-band far-red emission observed from MgAl2O4:Mn and Mg1.25Al1.75O3.75F0.25:Mn phosphors, prepared by a conventional method of a solid-state reaction, was interpreted as coming from Mn3+ ions.

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