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Author Kumar, Rajesh ♦ Eappen, K. P. ♦ Shukla, A. K. ♦ Tripathi, R. M. ♦ Puranik, V. D.
Source IACS Kolkata
Content type Text
Publisher Indian J. Phys.
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword LR 115 ♦ Spark counter ♦ Radon
Abstract Solid State Nuclear Track Detectors (SSNTD) are commonly used for longterm measurements of radon, thoron and progeny concentrations. In the present study,we compared the optical counting method and the spark counting technique forcounting the alpha tracks on LR 115 track detector films. The paper discusses thevarious parameters that are innate in the process. More than 300 films were countedby both optical microscope and spark counter and the results are compared. Theoverall results show that the tracks obtained by spark counting are marginally lesscompared to the optical measurement. A linear fit of the data gives a slope lessthat one, which indicates that both the methods are almost in good agreement forcounting the tracks when the track density is low. At higher track densities thespark counter gives an underestimation with respect to actual number of tracksformed, which could be corrected using a relation obtained between the tracksmeasured by optical method and spark counting.
Education Level UG and PG
Learning Resource Type Article
Journal Indian J Phys
Volume Number 83
Issue Number 6
Page Count 6
Starting Page 839
Ending Page 844