Pilot experiments on retrospective thoron measurements by CDs/DVDs

Pressyanov, D.; Dimitrova, I.; Georgiev, S.; Mitev, K.

doi:10.1016/j.radmeas.2012.04.014

Cited by 9 publications

(1 citation statement)

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“…The track density at a certain depth (greater than 80p,m below the front surface) is proportional to the cumulative radon concentration. Recently, it was shown that CD/DVDs could also be used for retrospective thoron measurements [8], [9], [10]. In contrast to radon, thoron could not be absorbed due to its much shorter half-life (radon half-life is 3.82d and thoron half-life is 55.6s).…”

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confidence: 99%

Retrospective Rn-220 measurements by compact discs

Georgiev

Dimitrova

Pressyanov

et al. 2012

2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC)

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This work studies the possibility for retrospective 220 Rn measurements by alpha-track etching of the back side (the labeled side) of home-stored CDs. It was already shown that such measurements are feasible, if the front side of the CD is etched, but these measurements require to correct the signal for the presence of 222 Rn. To the best of our knowledge, this is the only method for retrospective thoron measurement described in the literature. Our preliminary results presented here show that the coating on the back side of the CD prevents 222 Rn influence on 220 Rn measurements. Moreover, it appears that the signal at the back side is an order of magnitude greater than that at the front side, which would significantly improve the sensitivity of the method. Thus, the approach proposed in this work gives new practical means for retrospective thoron measurements.

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confidence: 99%