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Track etch detector
Of all track etch detector properties and applications studied since the mid 1950’s, one of the most track sensitive materials manufactured to date is poly-allyl diglycol carbonate, which is capable of detecting low-Let particles such as protons. TASL Track Etch responds to alphas, protons, neutrons, and heavy charged particles. When passing through the track etch material, an ionizing particle deposits energy to resident electrons, leaving a trail of damaged molecules along its track in the form of broken polymer chains and/or free radicals. Alpha particles create damage tracks directly in the surface of the detector material whereas neutrons produce tracks indirectly via elastic scattering and nuclear (n,α) and (n,p) reactions throughout the detector volume. When a charged particle passes into TASL Track Etch it creates a trail of invisible yet permanent ionization damage along the axis of its path. This damage can be revealed by etching the plastic in a strong hot solution of sodium hydroxide, naoH. tracks from charged particles such as recoil protons from fast neutron interactions and alpha particles from radon and radon daughters may be made visible in this way. The figure below shows an example of recoil proton tracks and alpha particle tracks in TASL Track Etch. TASL Track Etch is provided in laser-cut pieces with protective polyethylene covering which is removed prior to use in monitoring applications. Dot matrix identification with corresponding numerical identification can be provided. individual dosimeters are cut with one corner trimmed.
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