Determination of vanadium in titanate-based ferroelectrics by INAA with discriminating gamma-ray spectrometry

Kameník, Jan; Dragounová, Kateřina; Kučera, Jan; Bryknar, Z.; Трепаков, В. А.; Strunga, Vladimír

doi:10.1007/s10967-016-5101-1

Cited by 7 publications

(2 citation statements)

References 19 publications

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“…Заметим, что примеси Mn и Fe в отмеченных количествах зачастую присутствуют в недопированном STO, а Cr является в нём неустранимой примесью [5]. Содержание ванадия определялось в [6] методом нейтронной спектрометрии с дискриминацией γ-фона (INAA Instrumental Neutron Activation Analysis with discriminating gamma-ray spectrometry).…”

Section: образцы и методика экспериментаunclassified

Спектры люминесценции и необычный температурный сдвиг бесфононной эмиссионной линии V-=SUP=-3+-=/SUP=- в SrTiO-=SUB=-3-=/SUB=-

Скворцов,

Potuv cek,

Bryknar

et al. 2023

Оптика И Спектроскопия

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The paper presents the first observation of photoluminescence spectra of V3+ impurity in SrTiO3. The broad band of the observed emission is located in the near IR region and at low temperatures consists of a pronounced zero-phonon line (ZPL) with a maximum at 1157.1 nm (8642 сm-1) at 77 K and developed vibronic sidebands extending to 1450 nm. The observed ZPL is associated with an intracenter 1T2g → 3T1g or a closely located 1Eg → 3T1g emission transition in V3+ (3d2) ions replacing Ti4+ ions. It was found that the temperature shift of zero-phonon line is unusually large and its frequency decreases upon lowering the temperature. The local configuration instability of V3+ ions in the 3T1g ground state caused by soft TO1 temperature-dependent phonon mode present in SrTiO3 is considered as a possible source of the observed unusual temperature shift.

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Section: образцы и методика экспериментаunclassified

Спектры люминесценции и необычный температурный сдвиг бесфононной эмиссионной линии V-=SUP=-3+-=/SUP=- в SrTiO-=SUB=-3-=/SUB=-

Скворцов,

Potuv cek,

Bryknar

et al. 2023

Оптика И Спектроскопия

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show abstract

“…To reduce the uncertainty of the calculated area of the barely visible 2167 keV peak, samples were counted for 30 m at the maximum tolerable count rate, which gave between 10 and 30% dead-time, and the peak fit was carried out using maximum predetermined information: the peak position and width were fixed relative to nearby strong Se peaks. A similar discriminating gamma-ray spectrometry technique was used [41] for the determination of vanadium in materials with high content of titanium, barium, and strontium.…”

Section: Neutron Activation Systemsmentioning

confidence: 99%