Are the track detectors reusable after analysis?
Does anyone have idea of the laboratory where the analysis can be carried out?
Normally no. This is because etched SSNTDs, have alpha-neutron-proton pits registered on. The only re-usability could be found in this sense: An experimenter pre-etches SSNTDs for certain time. Tracks registered become visible. Then the SSNDs are exposed. After exposure they are etched again for longer time periods. The pre-etched tracks are larger and can be subtracted. This in a principal way of thinking, is a reusable SSNTD after analysis.
Typically SSNTDs are used only once. After exposure and etching it is possible, but not really advisable to reuse. There are many labs that do this type of analysis routinely. There are also a number of large commercial companies that sell SSNTDs as a "test kit" for home radon evaluation. In the US it is typical that the cost includes the SSNTD and the analysis. Current rates in the US are about $20 USD per analysis.
We get Track density i.e., number of tracks per square mm and then compare with the corresponding Track density due to standard solution. This gives idea about radon concentration in Bq per m3.
SSNTD detectors generally used for one exposition only, the etching procedure and evaluation is included in the price. After etching the detectors, the re-use of them is not recommended (the service partner do not send back the detectors to you, only the resullts). In the internet You can find several companies (different locations, prices etc. - choose one).
as i know we can find the track density, that mean the tracks number per square mm and then compare with standard values
NODS are used for once only. You can use it for measuring radon concentration in may types of measurements. First you must use the correct procedure of etching and litriture is found in many reaserchs concerning radon measurements and as an important step you must calibrate your detectors, to insure your measurements and to realize your results, concentrations are calculated by converting the track density into the concentration equation, also you can calculate many types of measurements from various types of samples.
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