Nuclear Track Detectors

Henshaw DL (1989) Application of sohd state nuclear track detectors to measurements of natural alpha-radioactivity in human body tissues. Nucl Tracks Radiat Meas 16(4) 253-270 Int J Radiat Appl lustrum Part D... 

M kel inen, I., Experiences with track etch detectors. Proc. of the 13th International Conference on Solid State Nuclear Track Detectors, Rome (September 1985) (to be published). 

Miles, J.C.H. and J. Dew, A Passive Radon Gas Detector for use in Homes, in Proceedings 11th International Conference on Solid State Nuclear Track Detectors (P.H. Fowler and V.M. Clapham, eds.) pp 569-579, Pergamon Press (1982). 

Nuclear track detectors are very simple and very efficient detectors of rare events that produce highly ionizing radiation. Carefully prepared and scanned track detectors have been used to identify individual rare decays. The detectors are integrating in that the damage caused by a track is not spontaneously repaired. The drawback to track detectors is that the tracks are small and can only be observed with a microscope. In the past, scanning by eye was extremely labor intensive and prone to error. Modern computer-controlled scanning has improved the speed and reliability of the analysis. Plastic track detectors that are sensitive to a particles are used extensively in commercial radon detectors. 

To meet the need to monitor levels of 222Rn in houses, passive samplers have been developed which measure average concentrations over long periods and do not need power suplies. In the Karlsruhe dosimeter (Urban Piesch, 1981), a polycarbonate nuclear track detector foil is mounted inside a plastic cup. The mouth of the cup is closed with a filter to allow radon to enter but to exclude decay products. After exposure, the detector foil is etched and the tracks counted optically. This is a... 

Paschoa, A.S., Mafra, O.Y., Cardoso, D.O. and Rocha, A.C.S., Application of solid state nuclear track detectors (SSNTD) to the Brazilian phosphate fertilizer industry to determine uranium concentration, Nucl. Tracks 8 (1984) 469- 72. 

Nuclear track detectors can be used to determine concentrations of a-emitting radon and thoron the number of tracks is related to the radon or thoron concentration. 

Nuclear track detectors can also be used to indirectly detect fast neutrons. Fast neutrons interact with the base material of a special film and cause recoil protons to be released. These protons then cause damage tracks in the film which can be made visible and counted as described above. The number of tracks can be used to determine the neutron dose. 

Fantini, M. and Richard, G., Solid State Nuclear Track Detectors. Pergamon Press, Oxford, 1981, pp. 193-196. 

A solid-state nuclear track detector is a piece of special plastic which is exposed as the sensitive element in a radon monitor. The alpha radiation from Rn and RnD, which penetrates the surface of the plastic, causes radiation damage along the entrance path, as shown in the schematic in Fig. 9.26. Chemical etching of the plastic after exposure... 

The tracks formed can be directly observed by the naked eye in cloud and bubble chambers, but the tracks remain only for a short time before they fade. For a permanent record we must use photography. On the other hand, in solid state nuclear track detectors (SSNTD), of which the photographic emulsion is the most common variant, the tracks have a much longer lifetime during which they can be made permanent and visible by a suitable chemical treatment. Because of the much higher density of the absorber, the tracks are also much shorter and oft therefore not visible for the naked eye. Thus the microscope is an essential tool for studying tracks in solids. 

Solid state nuclear track detectors (SSNTD)... 

Salama, T. A. and Ehnaghraby E. K. 2010. High gamma-ray dose measurement using nuclear track detector. Radiat. Prot. Dosim. 140(3) 218-222. 

Figure 1 Uranium decay series showing radon and its decay products. (Reproduced with permission from Khan HA (1993) Passive dosimetry of radon and its daughters using solid state nuclear track detectors (SSNTDS). Radiation Protection Dosimetry 46 149-170.)...

In principle, different types of passive detectors can be used such as thermoluminescent materials, electret devices, and solid-state nuclear track detectors. 

Abstract— The aim of this study is to estimate risks of inhalation dose (543 26.87B/m of indoor radon gas on a lung cancer for the exposed Rabbits by using a histological method. For this purpose, new exposure technique equipped with the nuclear track detectors type CR-39 (CR-39NTDs) has been designed to expose the Rabbits for 90 days. To get an optimum time of exposure the make damage on the lugs, it has been classified into three times 30,60 and 90 days. 

Uranium Toothpaste Nuclear track detector (fission-track density measurement) Singh and Virk (1983)... 

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