Wszystkie pola: liquid scintillation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Determination of exhalation rates through measurements of alpha and beta radiation with the aid of liquid scintillation counter
Autorzy:: Chau, N.
Chruściel, E.
Powiązania:: https://bibliotekanauki.pl/articles/148422.pdf
Data publikacji:: 2003
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: radon
exhalation rate
iquid scintillation counter
Opis:: In this paper, a method for the determination of the relative and mass exhalation rates is presented. For the measurement of radon content in an emanation chamber, an ?/ß liquid scintillation counter was applied. The method was preliminarily tested on the following samples: (1) samples of uranium tailing piles in the Kowary region, (2) samples obtained by mixing of the mentioned waste with various materials such as cement, gypsum and anhydrite and (3) samples of some building materials.
Źródło:: Nukleonika; 2003, 48, 3; 133-136
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Radon levels in household waters in southern Poland
Autorzy:: Kusyk, M.
Mamont-Ciesla, K.
Powiązania:: https://bibliotekanauki.pl/articles/147159.pdf
Data publikacji:: 2002
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: dose assessment
household water
limits
liquid scintillation
radon
Opis:: Determination of radon concentrations in household waters were performed in 1997 in three regions of south-western Poland which are considered to have an enhanced natural radioactivity level: in the Jelenia Gora and Walbrzych regions (both in south-western Sudety Mountains) and in the Upper Silesian Coal Basin. Water samples were collected from taps, wells and springs and were analyzed in a liquid scintillation counter. In the Upper Silesian Coal Basin all values are below 50 Bq/dm3 with a maximum of 32 Bq/dm3 and in the Sudety Mts. the radon concentration in water exceed this level in 68% of houses, reaching a maximum value of ca. 1400 Bq/dm3 in drilled well water in the Jelenia Gora region. The annual ingestion dose calculated for this value equals to ca. 0.5 mSv for infants, 0.4 mSv for children and 0.3 mSv for adults. The average annual effective whole body doses calculated for tap water samples for a representative population in the investigated regions range from about 0.02 mSv to 0.32 mSv and the maximum value reaches 1.39 mSv. The inhalation doses corresponding to the unit of water-borne radon concentration are about one order higher than the ingestion ones for tap water supplies.
Źródło:: Nukleonika; 2002, 47, 2; 65-68
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Measurement of radon concentration in the air by PicoRad detectors
Autorzy:: Chau, N. D.
Powiązania:: https://bibliotekanauki.pl/articles/146088.pdf
Data publikacji:: 2008
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: radon
PicoRad detectors
charcoal
adsorption
desorption
liquid scintillation
Opis:: The paper presents the theory and methodology of radon concentration measurement in the air by PicoRad detector, which consists of a porous canister held securely near the top of a plastic vial. The porous canister contains a bed of a controlled mass of charcoal (1.3 g) and silica desiccant (0.9 g). To measure the radon concentration, the vial detector is exposed in the radon laden air for a certain interval of time (24, 48 or 72 h or longer), then the liquid scintillation cocktail is added into the vial and measured by the help of a liquid scintillation counter. In this paper both radon adsorption by the charcoal detector, while it is being exposed in the radon laden air, and desorption of radon from the charcoal into the liquid scintillation cocktail were investigated. As a result, some conclusions concerning the methodology of radon measurement by PicoRad detectors have been done. The desorption factor of radon from the charcoal into the liquid scintillation cocktail was determined. The radon concentration values in the air measured by PicoRad detectors were in good agreement with those obtained by an AlphaGuard radon monitor.
Źródło:: Nukleonika; 2008, 53, suppl. 2; 21-24
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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