Investigation of radon concentration level and its progeny in different kinds of cancer by using Cr-39 NTD

Correlation Influence and Quantification of Grain Size on Radon Radioactivity for (Ca2SiO4) Ore Rocks

“…For the actual summation of alpha tracks, the radiation background was counted and eliminated from the total count of investigated samples [30][31][32]. Equation (1) gives the radon activity concentration Rn C in Bqm -3 at secular equilibrium [10,11,13,29,[33][34][35][36]:…”

“…where  is the density of alpha tracks (tracks/cm 2 ) and equation ( 2) was used to calculate the distribution density of alpha tracks [32]:…”

“…where  is the total number of alpha tracks, f is the matrix fields, 2 r  is the fields calibration area, T is the irradiation cycle (28 days), and η is the calibration coefficient of LR-115 [29,32]. where A E is the radon exhalation rate (Bqm -2 h -1 ), λ is the constant of radon decay (0.00756 h −1 ), Rn C is the activity concentration of radon (Bqm -3 ), V is the investigated sample volume (m 3 ), A is the surface area (m 2 ), and T is irradiation cycle [37][38][39].…”

Assessment of alpha emitters in urine for thyroid diseases patients by CR-39 technique

“…It is produced along the track by electron collision cascades or directly by atomic displacements brought on by locally intense electric fields resulting from the ionization burst close to the particle path (the so-called "ion explosion spike") [1]. During the natural exposure period, the αparticle enters the TASTRAK plastic track detector; it creates a trail of damage along its path [7]. This damage is invisible but may be revealed by chemical etching.…”