Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Aarne Maaroos"'
Publikováno v:
Physica B: Condensed Matter. 513:69-71
The hyperfine structure (HFS) of F + centres in CaS single crystals due to the interaction with 33 S and 43 Ca nuclei was observed in EPR spectra for the first time. Angular variations of the HFS were measured for rotation of magnetic field in {100}
Autor:
I. Kudryavtseva, Aleksandr Lushchik, S. Pazylbek, Ch. Lushchik, A. Tussupbekova, Vitali Nagirnyi, Aarne Maaroos, Evgeni Vasil'chenko
Publikováno v:
Physics of the Solid State. 57:2191-2201
The blue and green terbium luminescence excitation spectra (5–15 eV) at a temperature of 9 or 300 K have been measured for a set of CaSO4 : Tb3+ phosphors with calcium and terbium ions characterized by fundamental features, which were synthesized b
Autor:
Aleksandr Lushchik, Vitali Nagirnyi, Aarne Maaroos, I. Kudryavtseva, Cheslav Lushchik, F. Savikhin
Publikováno v:
Radiation measurements 56, 139-142 (2013). doi:10.1016/j.radmeas.2013.01.037
Radiation measurements 56, 139 -142 (2013). doi:10.1016/j.radmeas.2013.01.037
The emission spectra of single and polyterbium centers have been measured at the excitation of CaSO4:Tb3+ phosphors with different charge compensators (Na+, calcium va
The emission spectra of single and polyterbium centers have been measured at the excitation of CaSO4:Tb3+ phosphors with different charge compensators (Na+, calcium va
Autor:
Aarne Maaroos, I. Kudryavtseva, Evgeni Vasil'chenko, F. Savikhin, E. Shablonin, Aleksandr Lushchik, Ch. Lushchik
Publikováno v:
Optics and spectroscopy 111, 434-440 (2011). doi:10.1134/S0030400X11090165
The processes of photon multiplication in insulators have been considered. The luminescence of Tb3+ ions (5 D 3 → 7 F J , 5 D 4 → 7 F J transitions) upon intracenter excitation, the optical excitation of oxyanions, or the formation of separated e
Publikováno v:
Physics of the solid state 53, 1179-1187 (2011). doi:10.1134/S1063783411060084
The properties of the majority trapped-hole centers in MgO, such as g-factors, positions of absorption and luminescence bands, and temperatures of thermal destruction, have been analyzed with the emphasis on the observed regular trends and interrelat
Autor:
Hugo Mändar, Eduard Feldbach, Rando Saar, Väino Sammelselg, J. Kozlova, Aarne Maaroos, Marco Kirm
Publikováno v:
physica status solidi c. 8:2669-2672
MgO nano-powder was synthesized using the combustion method and was studied by low temperature VUV spectroscopy under synchrotron radiation excitation. A considerable blue shift (by ∼0.6 eV, see the figure) of UV luminescence excited in intrinsic a
Autor:
Tea Avarmaa, Aarne Maaroos, Eduard Feldbach, V. P. Denks, Margus Kodu, M. Aints, Marco Kirm, Raivo Jaaniso, Jüri Raud
Publikováno v:
Applied Surface Science. 257:5328-5331
Hydrogen doped MgO films were grown by pulsed laser deposition method. Gaseous hydrogen stored in cavities of milky MgO single crystal targets provided doping in film deposition process. Clear MgO targets without hydrogen were used in the preparation
Publikováno v:
physica status solidi (b). 248:239-242
Undoped single crystals of Lu 3 Al 5 O 12 annealed in the reduced atmosphere or additively colored in Al vapors were studied at 4.2-400 K by the time-resolved spectroscopy methods. The 3.15 eV emission, excited in the 3.4, 5.3, and 6.1 eV absorption
Autor:
Jong-Sik Choi, Myung-Won Lee, Marco Kirm, Eduard Feldbach, Tea Avarmaa, M. Aints, Aarne Maaroos, Margus Kodu, Jüri Raud, V. P. Denks, Hugo Mändar, Raivo Jaaniso, Väino Sammelselg, Y. T. Matulevich
Publikováno v:
Thin Solid Films. 519:846-851
In this work, pulsed laser-deposited thin films of MgO were studied for application in plasma display panels. The firing voltage (FV) of discharge cells with MgO films was measured and the film structure was investigated as a function of film deposit
Publikováno v:
physica status solidi (a). 207:1166-1169
New composite materials made of transition metal oxides doped with silver nanoparticles are proposed. Titanium and zirconium dioxide matrices were prepared by sol–gel method adjusted for addition of silver nanodopants. Commercially available silver