Autor: Machaj, B. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Large area scintillation detector for dosimetric stand with improved light collection
Autorzy:: Machaj, B.
Mirowicz, J.
Kowalska, E.
Powiązania:: https://bibliotekanauki.pl/articles/147646.pdf
Data publikacji:: 2011
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: large area scintillator
light collection
radioactive contamination
Opis:: In order to improve scintillation light collection from a thin plastic scintillator, the shape of a light reflector, and a new concept of extraction scintillation light trapped inside the scintillator were investigated. The trapped scintillation light is extracted from the scintillator by cutting the scintillator into two pieces with the edges machined at an angle of 45 centi grade and polished. Considerable improvement of detection efficiency can be achieved when the extracted and the escape scintillation light are collected together. Prototype of such a scintillation probe was constructed and investigated.
Źródło:: Nukleonika; 2011, 56, 4; 317-321
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Performance of a plastic scintillator and GM pancake tubes as alpha and beta contamination detectors in dosimetric stand
Autorzy:: Machaj, B.
Mirowicz, J.
Kowalska, E.
Powiązania:: https://bibliotekanauki.pl/articles/147069.pdf
Data publikacji:: 2011
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: dosimetric stand
detection system
GM counter
plastic scintillator
Opis:: A model of detection probe with a plastic scintillator (230 × 105 × 1 mm3) with a ZnS(Ag) layer at the top, and a model with six pancake Geiger-Müller (GM) counters were investigated as alpha particles (Am-241) and beta radiation (Sr-90) contamination detection probes at a dosimetric stand. A detection probe, 166 × 104 mm2 of active area, with a proportional counter was also investigated for comparison. The scintillation probe showed a higher alpha detection efficiency and a comparable beta detection efficiency with respect to the probe containing the proportional counter. The GM probe shoved a higher alpha detection efficiency, and a lower beta detection efficiency than the proportional counter probe. Detection efficiency of the scintillation probe strongly depends on the distance from the photomultiplier tube (PMT) photocathode. Active area of the GM probe of all counters constitutes approximately 50% of its measuring area.
Źródło:: Nukleonika; 2011, 56, 1; 53-56
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Metrological features of a beta absorption particulate air monitor operating with wireless communication system
Autorzy:: Jakowiuk, A.
Urbański, P.
Świstowski, E.
Machaj, B.
Pieńkos, J.
Kowalska, E.
Powiązania:: https://bibliotekanauki.pl/articles/146846.pdf
Data publikacji:: 2008
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: ambient air
beta-ray absorption
particulate matter
wireless communication
Opis:: A system for measurements of particulate matter in the ambient air, employing beta absorption instrument AMIZ-2007 with wireless communication facilities based on GPRS technology, is presented. Uncertainty of measurements caused by the counting statistics was analyzed and it was found that at least 3 h of sampling time is needed to achieve coefficient of variation lower than 20% for the average concentration of particulate matter in the ambient air exceeding 10 μg/m3. Application of a C-14 beta ray source instead of Pm-147 improves sensitivity of the measurement ca. two times. Some results of on-line operation of the system with PM10 and PM2.5 samplers are also shown.
Źródło:: Nukleonika; 2008, 53, suppl. 2; 37-42
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

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