Excitation energy transfer to luminescence centers in MIIMoO4 (MII=Ca, Sr, Zn, Pb) and Li2MoO4

Spassky, D.; Козлова, Н. С.; Nagirnyi, V.; Савон, А.Е.; Hizhnyi, Yu.; Nedilko, S.

doi:10.1016/j.jlumin.2017.02.048

Cited by 38 publications

(11 citation statements)

References 53 publications

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“…Molybdates and tungstates find a wide range of practical applications due to their ability to adopt different crystallographic structures, whose physical properties can be further modified by a chemical composition [1,2]. In particular, these materials are used as scintillators, down-conversion phosphors, white light-emitting diodes, laser host materials, catalysts, sensors and pigments [3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO4

Jonane

Cintiņš

Kalinko

et al. 2018

Low Temperature Physics

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Thermochromic phase transition was studied in CuMoO4 using the Cu and Mo K-edge X-ray absorption spectroscopy in the temperature range of 10-300 K. The hysteretic behavior has been evidenced from the temperature dependence of the pre-edge shoulder intensity at the Mo K-edge, indicating that the transition from brownish-red γ-CuMoO4 to green α-CuMoO4 occurs in the temperature range of 230-280 K upon heating, whereas the α-to-γ transition occurs between 200 and 120 K upon cooling. Such behavior of the pre-edge shoulder at the Mo K-edge correlates with the change of molybdenum coordination between distorted tetrahedral in α-CuMoO4 and distorted octahedral in γ-CuMoO4. This result has been supported by ab initio full-multiple-scattering X-ray absorption near edge structure (XANES) calculations.

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Section: Introductionmentioning

confidence: 99%

X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO4

Jonane

Cintiņš

Kalinko

et al. 2018

Low Temperature Physics

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“…Ранее аппроксимация на основе экспериментальных спектров поглощения проводилась для кристаллов PbMoO 4 [30,31] и MgMoO 4 [15]. Значение E 0 , полученное для молибдата свинца 3.71 eV, согласуется с результатами предыдущих [49] П р и м е ч а н и е. * -результаты были получены для нанопорошков.…”

Section: проявление экситонов в молибдатахunclassified

“…В работе [49] E g определялась на основе совместного анализа результатов теоретических расчетов зонной структуры и экспериментальных спектров отражения. Корректировка рассчитанной E g проводилась путем смещения состояний зоны проводимости так, чтобы положе-ние пиков отражения расчетного спектра соответствовало экспериментальным.…”

Section: оценка ширины запрещенной зоны молибдатовunclassified

“…Корректировка рассчитанной E g проводилась путем смещения состояний зоны проводимости так, чтобы положе-ние пиков отражения расчетного спектра соответствовало экспериментальным. Сравнение значений E 0 с E g , полученными в [49], показывает достаточно хорошее согласие для кристалла SrMoO 4 (4.75 и 4.7 eV), тогда как для PbMoO 4 (3.71 и 3.3 eV) и CaMoO 4 (4.76 и 4.4 eV) значение E 0 заметно превышает рассчитанные E g . Мы полагаем, что значение E g для PbMoO 4 , полученное в [49], было недооценено.…”

Section: оценка ширины запрещенной зоны молибдатовunclassified

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Правило Урбаха И Оценка Ширины Запрещенной Зоны В Молибдатах

Федюнин¹,

Спасский²

2020

Физика Твердого Тела

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“…In order to study the temperature dependent luminescence properties of the PMO crystal in the region of the direct creation of excitons, excitation energy above the band gap while lower than the ionization threshold is required [25]. The bandgap of PMO was reported to be 3.3 eV [26], therefore an excitation source having an energy of 4.42 eV was selected for a comparative luminescence analysis of the grown PMO crystals. The scintillation performance of the PMO crystal grown from powders synthesized from ancient Pb and deeply purified MoO 3 powders was studied under γ-ray excitation in the temperature range of 10-300 K and compared with a reference PMO crystal.…”

Section: Introductionmentioning

confidence: 99%

PbMoO4 Synthesis from Ancient Lead and Its Single Crystal Growth for Neutrinoless Double Beta Decay Search

et al. 2020

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A powder synthesis of PbMoO4 (PMO) from ancient lead (Pb) and deeply purified commercial MoO3 powders was performed using a wet chemistry technique to achieve the low radioactivity scintillator for neutrinoless double beta decay search in 100Mo. The synthesized powders were used to grow single crystals of PbMoO4 by the Czochralski technique in an Ar environment. The luminescence and scintillation properties were measured with excitations using UV, X- and γ-rays in the temperature range of 10–300 K. Annealing of the grown PMO crystal in an air atmosphere significantly enhanced the scintillation light yield compared to that measured before annealing. The scintillation light yield of grown PMO crystal at 10 K was found to be 127% to that of a reference PMO crystal under 662 keV γ-rays excitation from a 137Cs source. The background measurement of the grown crystal performed at 50 K shows a lower internal activity from 210Pb compared to that of reference PMO (grown from modern Pb) crystal. These preliminary performances show that the PMO crystal grown from ancient Pb and deeply purified MoO3 powders has a great potential to be used as a cryogenic scintillator for the neutrinoless double beta decay search in 100Mo.

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Excitation energy transfer to luminescence centers in MIIMoO4 (MII=Ca, Sr, Zn, Pb) and Li2MoO4

Cited by 38 publications

References 53 publications

X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO4

X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO4

Правило Урбаха И Оценка Ширины Запрещенной Зоны В Молибдатах

PbMoO4 Synthesis from Ancient Lead and Its Single Crystal Growth for Neutrinoless Double Beta Decay Search

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