@article{MAKHILLRJAS201914110153,
    title = {Determination the Effect of Gamma Radiation on (CR-39, CN-85)
Detectors by Using of Penetration of (He-Ne) Laser Beam},
    journal = {Research Journal of Applied Sciences},
    volume = {14},
    number = {1},
    pages = {45-48},
    year = {2019},
    issn = {1815-932x},
    doi = {rjasci.2019.45.48},
    url = {https://makhillpublications.co/view-article.php?issn=1815-932x&doi=rjasci.2019.45.48},
    author = {Hussain,Wijdan,Laith and},
    keywords = {strain effect,stress,Nuclear track detectors,(He-Ne) laser beam,CR-39,CN-85,gamma radiation},
    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(P<sub>0</sub>  /P<sub>av</sub>) was calculated when P<sub>0</sub>  is the penetration   
of laser beam through detectors without gamma radiation and stress effects and P<sub>av</sub>  is average the penetration 
of laser beam through detectors with the gamma radiation and stress effects. The value of ln(P<sub>0</sub>  /P<sub>av</sub>) 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(P<sub>0</sub>  /P<sub>av</sub>) was increase with increase of stress effect until to 1.6&times;10<sup>6</sup> N/m<sup>2</sup> and 12&times;10<sup>6</sup> N/m<sup>2</sup> 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).}
    }