S M Farid
Articles written in Pramana – Journal of Physics
Volume 20 Issue 6 June 1983 pp 559-567 Nuclear Instrumentation
An attempt is made to determine the response of CR-39 and cellulose nitrate plastic track detectors subjected to thermal neutrons. The α-particles are produced from (
Volume 21 Issue 5 November 1983 pp 339-345 Nuclear And Particle Physics
Makrofol polycarbonate plastic track detectors have been exposed to54132Xe -ions of energy 1.1 MeV/N from the cyclotron beam. The bulk etch rate and track etch rate are measured for different temperatures and the activation energies are calculated. The maximum etched track length is compared with the theoretically computed range. The critical energy loss is (d
Volume 23 Issue 2 August 1984 pp 187-198 Nuclear And Particle Physics
Measurements of the dependence of track etch rate on the energy-loss of different ions have been presented. In this method,1840Ar,1022Ne,816O and612C-ions of different energies are used as energetic heavy ions for track formation in the detectors. The bulk etch rate and track etch rate are measured for different temperatures and hence the activation energies are determined. The variation of
Volume 24 Issue 3 March 1985 pp 475-484 Nuclear Physics
Samples of Lexan and Makrofol-E polycarbonate plastic track detectors were exposed to 1·1 MeV/N54132Xe-ions to investigate the thermal track fading properties of these plastics. The experimental results show that there is no effect of annealing on the bulk etch rate while the track etch rate decreases with annealing. The track diameter decreases with increase in annealing time and temperature. It is also observed that the track density is reduced as a result of annealing. The experiments reveal that the track lengths are, in general, decreased by the application of heat and that the oblique tracks are less stable than the vertical tracks. The decrease in diameter of54132Xe-ion tracks in Makrofol-E due to heat treatment is faster than that of54132Xe-ion tracks in Lexan.
Volume 25 Issue 1 July 1985 pp 29-41 Nuclear Physics
The etch pit diameters of soda glass detector samples exposed to54132Xe-ions of different energies are measured for different etching times after etching the detector in a ‘new etchant’ free of the adverse effect of the etch product layer. The dependence of track diameter on the energy and on the energy loss, d
Volume 25 Issue 3 September 1985 pp 259-265 Nuclear Physics
The effect of heat treatment on the latent tracks in cellulose nitrate plastic track detectors has been studied. The bulk etch rate increases with annealing temperature while the track diameters of different ions in cellulose nitrate decrease with increase in annealing time and temperature. Experimental results show that for heavier ions higher temperatures are needed for their complete erasure. The track length and track etch rate are decreased by the application of heat. Experiments reveal that annealing reduces track density. The vertical tracks are more stable than the oblique tracks and require higher temperature for their complete erasure.
Volume 26 Issue 5 May 1986 pp 419-425 Instrumentation
The track etch rates of1020Ne-ion in cellulose nitrate (LR-115) have been measured for different temperatures and the activation energy is determined. The experimental results show that both the track etch rate and the normalized track etch rate depend on the energy loss as well as on etching temperature. The maximum etched track length of1020Ne-ion agrees with the theoretically computed range. The experimental results show that there is no sharp threshold, at least in CN(LR-115).
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