2009
DOI: 10.1134/s1063783409060134
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Transient hole-polaron optical absorption in Li6Gd(BO3)3 crystals

Abstract: Представлены результаты исследования короткоживущего оптического поглощения (КОП) и люминесценции литий-гадолиниевого ортобората Li 6 Gd(BO 3) 3 (LGBO) в видимой и ультрафиолетовой областях спектра. Методом абсорбционной оптической спектроскопии с наносекундным временным разрешением установлено, что КОП LGBO обусловлено оптическими переходами в дырочных центрах, при этом кинетика релаксации оптической плотности контролируется процессом междефектной туннельной рекомбинации с участием данных дырочных центров и э… Show more

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Cited by 12 publications
(3 citation statements)
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“…For the Ce1 cen ter, as a possible model could serve the Ce 3+ ion in the regular site of the Gd 3+ ion located in the vicinity of a defect, for instance, a vacancy. Experiments per formed on LGBO crystals established efficient forma tion of lithium cation vacancies under quite moderate irradiation [28,29]. It is known [30] that cation vacan cies can form also to compensate for excess charge or lattice deformation induced by incorporation of a sub stitution impurity.…”
Section: Luminescence Spectra Of Ce 3+mentioning
confidence: 99%
“…For the Ce1 cen ter, as a possible model could serve the Ce 3+ ion in the regular site of the Gd 3+ ion located in the vicinity of a defect, for instance, a vacancy. Experiments per formed on LGBO crystals established efficient forma tion of lithium cation vacancies under quite moderate irradiation [28,29]. It is known [30] that cation vacan cies can form also to compensate for excess charge or lattice deformation induced by incorporation of a sub stitution impurity.…”
Section: Luminescence Spectra Of Ce 3+mentioning
confidence: 99%
“…Nanosecond electron beam with an energy 200-250 keV excites in LGBO crystals intense cathodoluminescence concentrated in the spectral range of 2.5-3.4 eV that is caused by d-f luminescence of Ce 3 þ ions in LGBO [36,37]. However, increased luminescence intensity and decay kinetics specificity differ significantly from those in case of direct photoexcitation of Ce 3 þ emission or excitation of the luminescence by photon radiation in the interband transition region.…”
Section: Introductionmentioning
confidence: 93%
“…LYBO crystal has the ability to become a good scintillation detector and lasing material [11,17]. LGBO crystal has the potential to be used as a radiation detector due its good scintillation and luminescence properties [10,18,19]. 6 Li, 10 B, 157 Gd, 155 Gd isotopes interact with thermal neutrons that produce charged particles and γ-rays with MeV energy, which are capable of exciting some luminescence centers in the crystal lattice and emit signals to be detected by the optical sensors [20].…”
Section: Introductionmentioning
confidence: 99%