The influence of thoron on measurement results of radon exhalation rate
Creators
- 1. Nanhua Univ., Hengyang (China). School of Nuclear Science and Technology
- 2. Department of Physics, University of Hongkong, Pokfulam Road, Hongkong (China)
Description
Because of thoron exhalation, the measurement results of radon exhalation rate using a local still method is usually larger than the true value of radon flux rate of the monitored material surface. The influence of 216Po(ThA) on radon exhalation rate can be eliminated for sensitive radon monitors. Theoretical evaluations of the influence of 212Bi(ThC) and 212Po(ThC')on radon exhalation rate are carried out in a sampler with diameter of 188 mm, and height of 125 mm, and supplied electrostatic field inside (generated by high voltage and electret) under following conditions: the sampling time are 1, 2, 3 h, respectively, thoron exhalation rate is 100 times of radon's. The calculation results indicate that the measurement results of radon flux rate are possibly 35.5% larger than true value due to the influence of thoron for fast and multifunctional radon monitors with electret, high voltage, respectively and using CR-39 SSNTD as detector, but this influence is negligible for PCMR-1 passive and continuous radon monitor using a silicon surface barrier as detector
Additional details
Publishing Information
- Journal Title
- Atomic Energy Science and Technology
- Journal Volume
- 36
- Journal Issue
- 6
- Journal Page Range
- p. 543-547
- ISSN
- 1000-6931
INIS
- Country of Publication
- China
- Country of Input or Organization
- China
- INIS RN
- 34078716
- Subject category
- S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
- Descriptors DEI
- BISMUTH 212; EXHALATION; MONITORS; POLONIUM 212; POLONIUM 216; RADON; RADON 220; SENSITIVITY
- Descriptors DEC
- ALPHA DECAY RADIOISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BISMUTH ISOTOPES; CLEARANCE; ELEMENTS; EVEN-EVEN NUCLEI; EXCRETION; FLUIDS; GASES; HEAVY NUCLEI; HOURS LIVING RADIOISOTOPES; ISOTOPES; MEASURING INSTRUMENTS; MILLISECONDS LIVING RADIOISOTOPES; MINUTES LIVING RADIOISOTOPES; NANOSECONDS LIVING RADIOISOTOPES; NONMETALS; NUCLEI; ODD-ODD NUCLEI; POLONIUM ISOTOPES; RADIOISOTOPES; RADON ISOTOPES; RARE GASES; SECONDS LIVING RADIOISOTOPES