Authors : Hussain A. Al-Jobouri, Fala H. Taha, Laith Ahmed Najam and Wijdan Thamer Faaz
Abstract: The penetration of (He-Ne) laser beam on the Nuclear Track Detectors (NTDs) types CR-39 and CN-85 was measured after the gamma radiation effects with doses (0, 42.3, 84.6, 126.9, 169.2, 211.5, 253.8 Gy) and (0, 12.7, 25.4, 38.1, 50.8, 63.4, 76.1, 88.8 Gy) or CR-39 and CN-85 detectors, respectively. The penetration of (He-Ne) laser beam was also measured after the stress effect at the range (50, 55, 65, 100, 102, 106 N) for both detectors. The penetration coefficient of (He-Ne) laser beam ln(P0 /Pav) was calculated when P0 is the penetration of laser beam through detectors without gamma radiation and stress effects and Pav is average the penetration of laser beam through detectors with the gamma radiation and stress effects. The value of ln(P0 /Pav) was increase with increase of gamma radiation dos until to 220 and 75 Gy for CR-39 and CN-85 detectors, respectively. While the value of ln(P0 /Pav) was increase with increase of stress effect until to 1.6×106 N/m2 and 12×106 N/m2 for CR-39 and CN-85 detectors, respectively. This study shows there is a possibility to use the penetration of (He-Ne) laser beam to measure the effect of gamma radiation and stress on anther (NTDs).
Hussain A. Al-Jobouri, Fala H. Taha, Laith Ahmed Najam and Wijdan Thamer Faaz, 2019. Determination the Effect of Gamma Radiation on (CR-39, CN-85) Detectors by Using of Penetration of (He-Ne) Laser Beam. Research Journal of Applied Sciences, 14: 45-48.