Temat: 78.40.Ha - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Thermochromic Effect in Doped Bi₁₂SiO₂₀ Crystals
Autorzy:: Diachenko, A.
Panchenko, T.
Powiązania:: https://bibliotekanauki.pl/articles/1029025.pdf
Data publikacji:: 2018-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.65.Hw
42.70.Nq
78.20.Ci
78.20.nb
78.40.Fy
78.40.Ha
Opis:: Optical-temperature investigations of stationary and photo-induced absorption in undoped and Al (or Ga) doped Bi₁₂SiO₂₀ crystals are discussed. In the wave-number range 22000-4000 cm¯¹ under temperatures from 80 to 650 K, peculiarities of thermochromic effect have been revealed and temperature dependences of intensity of bands forming photo- and thermochromic effects have been found. A correlation between these dependences and spectra of thermostimulated current is explained.
Źródło:: Acta Physica Polonica A; 2018, 133, 4; 936-939
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Distribution of $Pb^{2+}$ Ions in $PbF_{2}$-Doped $CaF_{2}$ Crystals
Autorzy:: Paraschiva, M.
Nicoara, I.
Stef, M.
Bunoiu, O.
Powiązania:: https://bibliotekanauki.pl/articles/1538667.pdf
Data publikacji:: 2010-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.70.Hj
68.35.Dv
78.20.Ci
78.40.Ha
81.10.Fq
Opis:: Calcium fluoride crystals doped with various concentrations of $PbF_{2}$ have been grown using the Bridgman technique. The optical absorption spectra reveal the characteristic UV absorption bands of the $Pb^{2+}$ ions. The distribution of the $Pb^{2+}$-ions along four crystals has been investigated using the optical absorption method. Taking into account the relationship between the optical absorption coefficient and the concentration of the impurities in the samples, the effective segregation coefficient of the $Pb^{2+}$ ions has been calculated. Our study shows that the effective segregation coefficient of the $Pb^{2+}$ ions in $CaF_{2}$ host depends on the dopant concentration, and varies between 0.85 and 1.15, for 0.5 mol%$PbF_{2}$ and 3 mol%$PbF_{2}$-doped $CaF_{2}$, respectively.
Źródło:: Acta Physica Polonica A; 2010, 117, 3; 466-470
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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