Etching and optical properties of 1–2 MeV alpha particles irradiated CR-39 radiation detectors

Pires, K. C. C.; Assunção, M.; Rana, M. A.; Guedes, S.; Künzel, R.; Trindade, Neilo Marcos

doi:10.1016/j.nima.2022.167370

Cited by 2 publications

(1 citation statement)

References 43 publications

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“…The optimum chemical etching time of the CR-39 detector should be carefully determined for each alpha particle energy and associated dose [30]. These new findings open the door for using a combination of the CR-39 detector and a high-resolution flatbed scanner to assess the dose mapping of heavy ions over large areas.…”

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confidence: 99%

Low energy alpha particles dose mapping with a combination of CR-39 detector and a high resolution flatbed scanner

Mohamed,

Abdel-Mageed,

El Ghazaly

et al. 2024

Phys. Scr.

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The potential of a combination of the well-known CR-39 detector and a high-resolution flatbed scanner for low energy alpha particles dose mapping is investigated. The CR-39 detectors were irradiated with perpendicular incident 4 MeV alpha particles of doses 0.009, 0.018, 0.033, 0.051, 0.067, 0.134, and 0.164 Gy, thereafter, etched in 6.25 N NaOH at 70 °C. The CR-39 detectors were scanned with Canon CanScan 9000F Mark II of spatial resolution of 9600 dpi and color depth of 48 bit. The measurements reveal that the pixel values for different color channels are correlated linearly with 4 MeV alpha particles dose at the etching times of 2 h, 3 h, and 4 h. For blue channel, the maximum sensitivity was -53178  1463 pixel value/Gy at etching time of 4 h, compared to -15290  2004 pixel value/Gy, and -42255  840 pixel value/Gy at 2 h and 3 h respectively, the negative sign indicates the pixel values decrease as the 4 MeV alpha particles dose increases. While for etching times, 5 h and 6 h, the pixel values decrease exponentially as the 4 MeV alpha particles dose increases. For prolonged etching time, the pixel values are non-monotonic function of alpha particles dose. The optical density was evaluated as a function of etching time (removal thickness) of CR-39 irradiated with different doses. For 0.009 Gy, and 0.018 Gy doses of alpha particles, the optical density is linearly correlated with the etching time; for other doses, the optical density is not a monotonic function of the etching time. These new findings pave the way to use the combination of the CR-39 detector and high-resolution flatbed scanner for dose mapping of alpha particles and heavy ions over large-scale areas, applying etching conditions for each particle type and corresponding energy, that produce maximum sensitivity and linearity.

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Section: ( ) ( ) = +mentioning

confidence: 99%

Low energy alpha particles dose mapping with a combination of CR-39 detector and a high resolution flatbed scanner

Mohamed,

Abdel-Mageed,

El Ghazaly

et al. 2024

Phys. Scr.

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Verification of radon, radium, polonium concentrations and lung cancer rates in blood of female hookah smokers

2023

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Hookah smoking has become very popular in Iraq among women and men. Hookah tobacco contains natural radioactive elements, such as radon, radium, and uranium, as well as toxic elements, such as polonium, which are released during the combustion of tobacco and are inhaled by smoking. Most reviews focus on hookah tobacco, and only a few have investigated the blood of hookah smokers. In this study, a CR-39 detector was used to measure radon, radium, and polonium concentrations and conduct risk assessments in female hookah smokers of different ages. The results show that the concentrations of radon-222, polonium-218, and polonium-214 varied between 61.62 and 384.80, 5.45–33.64 on the wall of the can, and 2.43–15.00 Bq/m3 on the surface of the detector, respectively. The effective radium-226 concentration varied between 4.52 and 56.31 Bq/kg. The absorbed effective dose varied between 1.55 and 9.71 mSv/y, which is within the recommended limit (3–10 mSv/y) by International Commission on Radiological Protection (ICRP). The average case of lung cancer 107.91 cppp, which exceeds the European Union (EU) limit (96.9–104.8 cppp). The rates of radon activity and radon exhalation from the intake of a natural radionuclide due to hookah smoking in a female’s blood were calculated and discussed. This study aimed to establish preliminary results on the risks of radioactivity concentrations and assess the dose in the blood of women who smoke hookah and assess the possibility of developing cancer.

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Etching and optical properties of 1–2 MeV alpha particles irradiated CR-39 radiation detectors

Cited by 2 publications

References 43 publications

Low energy alpha particles dose mapping with a combination of CR-39 detector and a high resolution flatbed scanner

Low energy alpha particles dose mapping with a combination of CR-39 detector and a high resolution flatbed scanner

Verification of radon, radium, polonium concentrations and lung cancer rates in blood of female hookah smokers

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