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Electronic nose radiation sniffer,[link widoczny dla zalogowanych],[link widoczny dla zalogowanych]
US shipping ports receive about Six million cargo containers each year. Officials want to be able to check each one of these for smuggled nuclear material,[link widoczny dla zalogowanych], but today's detectors cannot process such numbers inside a reasonable time. These devices typically require an officer to look inside each container.
The gamma rays produced by radioactive materials can pass through containers relatively easily,[link widoczny dla zalogowanych],[link widoczny dla zalogowanych],[link widoczny dla zalogowanych], but uranium produces only small quantities of such radiation.
Joseph Farmer and colleagues at the Lawrence Livermore National Laboratory in California have produced a brand new detector sensitive even going to low levels of gamma radiation,[link widoczny dla zalogowanych],[link widoczny dla zalogowanych]. Their device is set to speed up screening times,[link widoczny dla zalogowanych].
It doesn't directly detect gamma rays themselves,[link widoczny dla zalogowanych],[link widoczny dla zalogowanych], but instead searches for the peroxide generated once the rays interact with water.
The detector includes an "electronic nose" chip coated having a thin layer of water that's condensed onto its surface,[link widoczny dla zalogowanych]. When gamma rays strike water molecules in that layer the nose chip detects any peroxide formed.
The inventors state that in addition to being more sensitive their design can select up a wider range of gamma ray energies than conventional detectors,[link widoczny dla zalogowanych],[link widoczny dla zalogowanych].
Browse the full electronic nose radiation sniffer patent application,[link widoczny dla zalogowanych],[link widoczny dla zalogowanych].
Justin Mullins,[link widoczny dla zalogowanych],[link widoczny dla zalogowanych], New Scientist consultant
Labels: physics
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