Automatic track countings

Université de Franche-Comté, Département de Chimie La Bouloie, Route de Gray, 25030 Besancon Cedex, France
Nuclear Tracks and Radiation Measurements (1982) 01/1984; 8(1):207-210. DOI: 10.1016/0735-245X(84)90088-7


For convenient utilization of track detectors, results must be obtained quickly, so automatic processes are usually employed. To this end two techniques are investigated : spark counter and quantimet system. The first one is appropriate for low densities (below 4000 tracks/cm2) ; for densities between 4000 tracks/cm2 and 2.2 105 tracks/cm2 counting is performed with a Cambridge Quantimet 720 ; for higher densities, two different methods are described which take into account the overlapping of tracks.

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    ABSTRACT: Present techniques for measuring personnel neutron doses with track detectors, and particularly with CR-39, are reviewed. Emphasis is on obtaining a more uniform response (tracks·cm-2·Sv-1) with energy and on extending this response below 100 keV. A better understanding of this CR-39 neutron response is obtained by studying the response to protons as a function of energy, angle and etching methods. The low-energy response is limited by background, although better quality CR-39 is becoming available. At high energies, the response can be manipulated by combinations of radiators and absorbers, as well as by etching parameters. Various methods yield neutron spectral data with varying degrees of detail. The variation of response with neutron direction is undesirably large. Despite its limitations, CR-39 remains the best available personal dosimeter for neutrons.
    International Journal of Radiation Applications and Instrumentation Part D Nuclear Tracks and Radiation Measurements 01/1986; 12(1-6):533-542. DOI:10.1016/1359-0189(86)90646-1
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    ABSTRACT: We have developed a semiautomatic measuring system for the analysis of fission tracks in minerals. This system consists of an optical microscope equipped with a drawing tube which is connected to an IBM compatible computer equipped with a digitizer. ATOM is the software, developed using TURBO-PASCAL Version 4.0. It is presently used for performing data input operations of densities, lengths and orientations of tracks. It also coordinates the activities of storing and processing the data of measured tracks and it gives the results of the statistical analysis. In this way, the mineral age determination can be made either by the Population Method (PM) or by the External Detector Method (EDM). The curves for fission track length distributions and orientations are drawn and may be printed out. This system's hardware and software are described in this paper.
    International Journal of Radiation Applications and Instrumentation Part D Nuclear Tracks and Radiation Measurements 12/1991; 19(1-4):255-260. DOI:10.1016/1359-0189(91)90187-M