Lifetime studies on excited (F2+)* and M centers in NaF doped with magnesium

1987 ◽  
Vol 140 (2) ◽  
pp. 355-360 ◽  
Author(s):  
L. Bosi ◽  
M. Nimis
Keyword(s):  
Lifetime Studies

Positron lifetime studies in organic media

1971 ◽  
Vol 4 (2) ◽  
pp. 261-268 ◽  
Author(s):  
K P Singh ◽  
R M Singru ◽  
C N R Rao
Keyword(s):  
Positron Lifetime ◽  
Organic Media ◽  
Lifetime Studies

Positron lifetime studies of decomposition in 2024 (Al-Cu-Mg) and 7010 (Al-Zn-Cu-Mg) alloys

1998 ◽  
Vol 39 (7) ◽  
pp. 893-899 ◽  
Author(s):  
G. Dlubek ◽  
P. Lademann ◽  
H. Krause ◽  
S. Krause ◽  
R. Unger
Keyword(s):  
Positron Lifetime ◽  
Mg Alloys ◽  
Lifetime Studies

Positron Lifetime Studies in the Kondo Insulator, FeSi

1997 ◽  
Vol 255-257 ◽  
pp. 512-514
Author(s):  
A. Bharathi ◽  
Y. Hariharan ◽  
A. Mani ◽  
C.S. Sundar
Keyword(s):  
Positron Lifetime ◽  
Kondo Insulator ◽  
Lifetime Studies

scholarly journals Luminescence Properties of Co-doped Eu3+, Bi3+ Lu2O3/Polyvinylpyrrolidone Films

Coatings ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 434 ◽  
Author(s):  
Ángel de Jesús Morales-Ramírez ◽  
Margarita García-Hernández ◽  
Dulce Yolotzin Medina-Velázquez ◽  
María del Rosario Ruiz-Guerrero ◽  
Fernando Juárez-López ◽  
...  
Keyword(s):  
Sol Gel ◽  
Dip Coating ◽  
Color Temperature ◽  
Hybrid Films ◽  
Effective Energy Transfer ◽  
Lifetime Studies ◽  
Cie Chromaticity ◽  
Dip Coating Technique ◽  
Quartz Substrates ◽  
Luminescent Centers

The effect of the polyvinylpyrrolidone (PVP, MW = 130,000) molar content, PVP/Lu = 1, 2.5, 4 and 5; on the photoluminescent and structural properties of sol-gel derived Lu2O3:Eu3+, Bi3+ has been analyzed. Thin hybrid films were deposited by means of the dip-coating technique on silica quartz substrates. Films deposited at 700 °C presented a cubic structure, with non-preferential orientation, even with the presence of PVP. The photoluminescence (PL) spectrum and Comission Internationale de l’Éclairage (CIE) chromaticity diagram of films revealed a reddish Eu3+ emission at 612 nm (5D0 →7F2) with an excitation at 320 nm of the Bi ions (6s2→6s6p), showing a highly-effective energy transfer process form Bi3+ to Eu3+ luminescent centers. On the other hand, the color temperature of the samples is strongly dependent on the PVP content, as a consequence of the observed difference on the branching ratios of 5D0 →7FJ transitions of europium ions. Lifetime studies present two different behaviors for the thin films: A non-exponential nature for the lower PVP contents, and a simple exponential nature for the highest PVP one, showing that the PVP tends to promote a better dissolution of segregates and, therefore, increases the lifetime of the Eu3+ emission.

Recombination lifetime studies of silicon spheres

1996 ◽  
Vol 41-42 ◽  
pp. 171-181 ◽  
Author(s):  
R AHRENKIEL ◽  
D LEVI ◽  
J ARCH
Keyword(s):  
Recombination Lifetime ◽  
Lifetime Studies ◽  
Silicon Spheres
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