In this study, we used strippable LR 115
type 2 which is a Solid State Nuclear Track Detector (SSNTD) widely known for
radon gas detection and measurement. The removed thickness of the active layer
of samples of this SSNTD, were determined by measuring the average initial
thickness (before etching) and residual thickness after 80 to 135 minutes
chemical etching in the standard conditions, using an electronic comparator.
These results allowed the calculation of the bulk etch rate of this detector in
a simple way. The mean value obtained is (3.21 ± 0.21) μm/h. This value is in
close agreement with those reported by different authors. It is an important
parameter for alpha track counting on the sensitive surface of this polymeric
detector after chemical etching because track density depends extremely on its
removed layer. This SSNTD was then used for environmental radon gas monitoring
in Côte d’Ivoire.
References
[1]
International Agency for Research on Cancer (1988) Evaluation of Carcinogenic Risk to Humans Man-Made Mineral Fiber Sand Radon. International Agency for Research on Cancer, 43.
[2]
Glenn, F.K. (1979) Radiation Detection and Measurement. John Wiley & Sons Inc., New York.
[3]
Zeeb, H. and Shannoun, F. (2009) Who Handbook on Indoor Radon, a Public Health Perspective. World Health Organization, Geneva.
[4]
Obed, R.I., Ademola, A.K. and Ogundare, F.O. (2012) Radon Measurement by Nuclear Tracks Detectors in Dwellings in Oke-Ogun Area, South-Western Nigeria. Radiation Protection Dosimetry, 148, 475-481. https://doi.org/10.1093/rpd/ncr196
[5]
Lemaitre, N. (2000) A chaque cas, sa mesure. Points et Commentaires en radiopro- tection. Bulletin de l’office de protection contre les rayonnements ionisants, No. 9, Mars/Avril 2000.
[6]
Agba, D.S.I., Koua, A.A., Dali, T.P.A., Monnehan, G.A. and Djagouri, K. (2017) Study of the Sensitivity of Polymeric Nuclear Track Detectors to Alpha Particles. Research Journal of Environmental and Earth Sciences, 2, 10-13.
http://dx.doi.org/10.19026/rjees.9.5297
[7]
Dwaikat, N., Safarini, G., El-hasan, M. and Iida, T. (2007) CR-39 Detector Compared with Kodalpha Film Type (LR 115) in Terms of Radon Concentration. Nuclear Instruments and Methods in Physics Research Section A, 574, 289-291.
https://doi.org/10.1016/j.nima.2007.01.168
[8]
Ghita, I.A. and Vasilescu, A. (2011) Radon Assessment with Solid State Nuclear Track Detectors in Bucharest and its Surrounding Region. Romanian Reports in Physics, 63, 940-947.
[9]
Cosma, C., Cucos-Dinu, A., Papp, B. and Begy, R. (2003) Soil and Building Material as Main Sources of Indoor Radon in Baita-Stei Radon Prone Area (Romania). Journal of Environmental Radioactivity, 116, 174-179.
https://doi.org/10.1016/j.jenvrad.2012.09.006
[10]
Deepak, V. and Shakir Khan, M. (2014) Assessment of Indoor Radon, Thoron and Their Progeny in Dwellings of Bareilly City of Northern India Using Track Etch Detectors. Romanian Journal of Physics, 59, 172-182.
[11]
Somogy, G. and Sazaly, A.S. (1973) Track-Diameter Kinetics in Dielectric Track Detectors. Nuclear Instruments and Methods, 109, 211-232.
https://doi.org/10.1016/0029-554X(73)90265-6
[12]
Somogy, G. (1980) Development of Etched Nuclear Tracks. Nuclear Instruments and Methods, 173, 21-42. https://doi.org/10.1016/0029-554X(80)90565-0
[13]
Jonsson, G. (1981) The Angular Sensitivity of Kodak LR-115 Film to Alpha Particles. Nuclear Instruments and Methods, 190, 407-409.
[14]
Fleisher, R.L., Price, P.B. and Walker, R.M. (1975) Nuclear Track in Solids: Principles and Applications. University of California Press, Berkley.
[15]
Nikezic, D. and Yu, K.N. (2003) Calculations of Track Parameters and Plots of Track Openings and Wall Profiles in CR39 Detector. Radiation Measurements, 37, 595-601.
https://doi.org/10.1016/S1350-4487(03)00080-5
[16]
Nikezic, D., Ng, F.M.F. and Yu, K.N. (2004) Theoretical Basis for Long-Term Measurements of Equilibrium Factors Using LR 115 Detectors. Applied Radiation and Isotopes, 61, 1431-1435. https://doi.org/10.1016/j.apradiso.2004.05.065
[17]
Fuji, M., Yokota, R., Atarashi, Y. and Hasegawa, H. (1991) Etching Characteristics of the New Polymeric Track Detector SR-86. International Journal of Radiation Applications and Instrumentation. Part D: Nuclear Tracks and Radiation Measurements, 19, 171-176. https://doi.org/10.1016/1359-0189(91)90167-G
[18]
Yip, C.W.Y., Ho, J.P.Y., Nikezic, D. and Yu, K.N. (2003) A Fast Method to Measure the Thickness of Removed Layer from Etching of SSNTD Based on EDXRF. Radiation Measurements, 36, 161-164. https://doi.org/10.1016/S1350-4487(03)00115-X
[19]
Yu, K.N., Yip, C.W.Y., Ho, J.P.Y. and Nikezic, D. (2004) Application of Surface Profilometry in Studying the Bulk Etch of Solid State Nuclear Track Detectors, Current Issues on Multidisciplinary Microscopy Research and Education, FORMATEX, 250-256.
[20]
Salama, T.A., Seddiki, U., Hegazy, T.M. and Morsy, A.A (2006) Direct Determination of Bulk Etching Rate for LR-115-11 Solid State Nuclear Track Detectors. Pramana, 67, 529-534. https://doi.org/10.1007/s12043-006-0013-1
[21]
Tse, K.C.C, Ng, F.M.F, Nikezic, D. and Yu, K.N. (2007) Bulk Etch Characteristics of Colorless LR 115 SSNTD. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 263, 294-299.
https://doi.org/10.1016/j.nimb.2007.04.308
[22]
Cross, W.G. and Tommasino, L. (1970) Rapid Reading Technique for Nuclear Particles Damage Tracks in Thin Foils. Radiation Effects, 5, 85-89.
https://doi.org/10.1080/00337577008235000
[23]
Nikezic, D. and Janicijevic, A. (2002) Bulk Etching Rate of LR 115 Detectors. Applied Radiation and Isotopes, 57, 275-278.
https://doi.org/10.1016/S0969-8043(02)00109-4
[24]
Nassiba, M. And Kahina, A. (2015) Mesure du gaz Radon à l’aide des Détecteurs Solides de Traces Nucléaires. Master en Physique option Biophysique et Imagerie, Université Abderrahmane Mira de Bejaïa, Béjaïa.
[25]
Nikezic, D. and Kostic, D. (1997) Simulation of the Track Growth and Determination the Track Parameters. Radiation Measurements, 28, 185-190.
https://doi.org/10.1016/S1350-4487(97)00065-6
[26]
Nikezic, D. (2000). Three Dimensional Analytical Determination of the Track Parameters. Radiation Measurements, 32, 277-282.
https://doi.org/10.1016/S1350-4487(00)00034-2
[27]
Yip, C.W.Y., Nikezic, D., Ho, J.P.Y. and Yu, K.N. (2006) Chemical Etching Characteristics for Cellulose Nitrate. Materials Chemistry and Physics, 95, 307-312.
https://doi.org/10.1016/j.matchemphys.2005.06.024
