Akademia im. Jana Dlugosza

Częstochowa, Poland

Akademia im. Jana Dlugosza

Częstochowa, Poland
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Diamonds obtained by chemical vapour deposition (CVD) method exhibit long-lived luminescence that could be observed during thermoluminescence (TL) measurements. These materials have similar TL sensitivity as standard LiF:Mg,Ti detectors. There is no TL fading in CVD diamonds for at least two weeks after irradiation. The material exhibits linear dose response. For these reasons diamonds have found use in dosimetry of ionizing radiation and UV detection. The paper presents results of radiation-induced thermoluminescence in diamond crystals obtained by CVD method. The research was performed by spectral resolved thermoluminescence (SR-TL) to determine the glow curve, trap levels and emission bands of investigated samples. © 2017, Wydawnictwo SIGMA - N O T Sp. z o.o. All rights reserved.

Luminescence is widely used in modern techniques of ionizing radiation dosimetry and in dating of geological materials and dating objects in archeology. For this purpose, the most frequently used are thermoluminescence (TL) and optically stimulated luminescence (OSL). In all these applications, the measurement sensitivity is extremely important. For this reason, the standard measurement technique is the method of measuring the intensity of emitted light by a photomultiplier operating in the photon counting mode. This measurement method provides a very good signal-tonoise ratio but does not give any information about the spectral distribution of the emission. Standard spectral measurements, using even the most advanced multichannel cooled CCD detectors, are only possible for much stronger light, exceeding several orders of magnitude the photomultiplier detection threshold. This article discusses a new method of spectral measurement that allows recording of much lower emissions. © 2017, Wydawnictwo SIGMA - N O T Sp. z o.o. All rights reserved.

Mandowska E.,Akademia im. Jana Dlugosza | Tkaczyk S.,Akademia im. Jana Dlugosza | Biernacka M.,Akademia im. Jana Dlugosza | Mandowski A.,Akademia im. Jana Dlugosza
Przeglad Elektrotechniczny | Year: 2013

Optically stimulated luminescence (OSL) may be used for estimating dose of absorbed radiation. The most popular OSL detectors are made of Al2O3:C as well as BeO crystals. For some applications (e.g. in medicine) it would be desirable to construct detectors in the form of higharea flexible foils. New OSL detectors were developed by incorporating Al2O3:C microcrystallites into organic (polymer) matrix. The article presents studies of newly synthesised hybrid detectors.

Mandowski A.,Akademia im. Jana Dlugosza | Marczewska B.,Polish Academy of Sciences | Mandowska E.,Akademia im. Jana Dlugosza | Bilski P.,Polish Academy of Sciences | And 2 more authors.
Przeglad Elektrotechniczny | Year: 2010

Optically stimulated luminescence (OSL) is a recent technique used for dosimetry of ionizing radiation. An advantage of this technique is the possibility of application of passive microdetectors (not requiring energy supply) which are very small in size. This paper presents results of investigation of microdetectors having size in the range of 0.1 to 5 mm using home made OSL reader HELIOS-1.

Akademia Im. Jana Dlugosza | Date: 2015-01-14

The essence of the invention is the use of ionic salts containing phosphonium cation and halide anion, especially iodide, as a means of herbicidal properties In the use according to the invention as ionic salts with the phosphonium cation and halide anion, is used, preferably triphenylmethylphosphonium iodide, triphenyl-n-pentylphosphonium iodide, triphenylheptylphosphonium iodide, triphenyldecylphosphonium iodide and triphenylhexadecylphosphonium iodide.

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