10 research outputs found
Estimate of etched tracks by optical method and spark counting
Solid State Nuclear Track Detectors (SSNTD) are commonly used for long
term measurements of radon, thoron and progeny concentrations. In the present study,
we compared the optical counting method and the spark counting technique for
counting the alpha tracks on LR 115 track detector films. The paper discusses the
various parameters that are innate in the process. More than 300 films were counted
by both optical microscope and spark counter and the results are compared. The
overall results show that the tracks obtained by spark counting are marginally less
compared to the optical measurement. A linear fit of the data gives a slope less
that one, which indicates that both the methods are almost in good agreement for
counting the tracks when the track density is low. At higher track densities the
spark counter gives an underestimation with respect to actual number of tracks
formed, which could be corrected using a relation obtained between the tracks
measured by optical method and spark counting.Estimate of etched tracks by optical method and spark counting
Rajesh Kumar, K P Eappen*, A K Shukla, R M Tripathi and V D Puranik
Environmental Assessment Division, Bhabha Atomic Research Centre, Mumbai-400 085,
India
E-mail : [email protected] Assessment Division, Bhabha Atomic Research Centre, Mumbai-400 085,
Indi