Powiadomienia systemowe
- Sesja wygasła!
- Sesja wygasła!
Identyfikatory
Warianty tytułu
Języki publikacji
Abstrakty
. A single scintillation cell (ö 54 × 74 mm) is used for the measurement of radon and thoron. The radon and thoron laden air is filtered and forced to flow at 1 dm3/min through the scintillation cell in the period of 1 10 min. The count number from alpha radiation is registered in the periods of 3 10 min and 20 30 min. Two values of detection and deposition efficiency of alpha radiation are used for radon (at air flow and air at rest in the cell) and for thoron. Measurements of radon laden air and thoron laden air showed good agreement between the reference concentration and the measured concentration, not worse than 1% for radon and not worse than 2% for thoron. Combination of radon + thoron concentration showed also a small interference ("cross talk") not worse than 1%.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
167--171
Opis fizyczny
Bibliogr. 10 poz., rys.
Twórcy
autor
autor
autor
- Department of Nuclear Instruments and Methods, Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warsaw, Poland, Tel.: +48 22 504 12 96, Fax: +48 22 811 15 32, bmachaj@ichtj.waw.pl
Bibliografia
- 1. Coleman RL (2002) A method for concurrent and continuous measurement of Rn-222 and Rn-220 using scintillation cells. Report ORLN/TM-2002/37. Oak Ridge National Laboratory
- 2. George AC (1996) State-of-the-art instruments for measuring radon/thoron and their progeny in dwellings – a review. Health Phys 70;4:451−463
- 3. Kozak K, Kochowska E, Kozłowska B, Mazur J, Dorda J, Janik M (2005) Test measurement of thoron concentration using two ionization chambers AlphaGuard vs. Radon monitor RAD7 (abstract). In: Proc of the 2nd Int Workshop – New Perspectives for Thoron Surveys and Dosimetry, June 6−10, 2005, Niska Banja, Serbia and Montenegro. http://www.vin.bg.ac.yu/ece/abstracts.htm
- 4. Machaj B, Bartak J (1998) Simulation of the activities of radon daughters on RGR monitor air filter. Nukleonika 43;2:175−184
- 5. Machaj B, Urbański P (2002) Principal component data processing in radon metrology. Nukleonika 47;1:39−42
- 6. Machaj B, Urbański P (2004) Influence of aerosol concentration and multivariate processing on the indication of radon progeny concentration in air. Nukleonika 49;3:123−129
- 7. Portable radon concentration gauge MR-1. http://www.ichtj.waw.pl/zami/
- 8. Proceedings of the ECE II, the 2nd Int Workshop – New Perspectives for Thoron Surveys and Dosimetry, June 6−10, 2005, Niska Banja, Serbia and Montenegro (2005) A summary. http://www.vin.bg.ac.yu/ece/pdf/SUMMARY%20OF%20ECE%20II.pdf
- 9. RAD7 radon detector (2000) Owner’s manual. Durridge Co. http://www.durridge.com/index.htm
- 10.Tokonami S, Yonehara H, Yamada Y (2003) Simple, discriminative measurement technique for radon and thoron concentrations with a single scintillation cell.Environment science. Annual Report 2002/2003. http://www.nirs.go.jp/report/nene/h14/05/88.html
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ6-0023-0012