Abstract:
:The use of silicon photodiodes for field radon measurements requires the utilization of measuring cells for protection against environmental electromagnetic fields. It is very important to study and optimize the impact of geometry conditions (dimensions of the measuring cell) on the photodiode detection efficiency that can be reduced more than 10-30 times. Two models (for volume-distributed nuclides around the detector and for radon progeny deposited on the diode surface radon progeny) were applied for simulation of the photodiode detection in measuring cells of different sizes. Their use allows an optimal choice of the most appropriate cell regarding the measurement conditions. Thus, for soil gas measurements cells we use a cell of 3.6 cm in diameter by 20 cm in height; for determination of the radon exhalation rate we use a cell of 16 cm in diameter by 14 cm in height; and for measurements in dwellings and large spaces we use cells larger than 20 cm and lower than 4 cm.
journal_name
Health Physjournal_title
Health physicsauthors
Voytchev M,Klein D,Voytchev Kdoi
10.1097/00004032-200106000-00011keywords:
subject
Has Abstractpub_date
2001-06-01 00:00:00pages
597-601issue
6eissn
0017-9078issn
1538-5159journal_volume
80pub_type
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