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RISS 인기검색어
- 검색키워드
- 저자 : Al-Ghamdi Hanan (검색결과 2 건)
- 무료
- 기관 내 무료
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Al-Saeedi F.H.F.,Sayyed M.I.,Kapustin F.L.,Al-Ghamdi Hanan,Kolobkova E.V.,Tashlykov O.L.,Almuqrin Aljawhara H.,Mahmoud K.A. 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.8
In the present work, untreated Iraqi sand with grain sizes varied between 100 and 200 mm was used to produce a colored glass sample that has shielding features against the low gamma-ray energy. Therefore, a weight of 70e60 wt % sand was mixed with 9e14 wt% B2O3, 8e10 wt% Na2O, 4e6 wt% of CaO, 3e6 wt% Al2O3, in addition to 0.3% of Co2O3. After melting and annealing the glass sample, the X-ray diffraction spectrometry was applied to affirm the amorphous phase of the fabricated glass samples. Moreover, the X-ray dispersive energy spectrometry was used to measure the chemical composition, and the MH-300A densimeter was applied to measure the fabricated sample's density. The Makishima-Makinzie model was applied to predict the mechanical properties of the fabricated glass. Besides, the Monte Carlo simulation was used to estimate the fabricated glass sample's radiation shielding capacity in the low-energy region between 22.1 and 160.6 keV. Therefore, the simulated linear attenuation coefficient changed between 10.725 and 0.484 cm1 , raising the gamma-ray energy between 22.1 and 160.6 keV. Also, other shielding parameters such as a half-value layer, pure lead equivalent thickness, and buildup factors were calculated
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FTIR study of gamma and electron irradiated high-density polyethylene for high dose measurements
Hanan Al-Ghamdi,Khaled Farah,Aljawharah Almuqrin,Faouzi Hosni 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.1
A reliable and well-characterized dosimetry system which is traceable to the international measurementsystem, is the key element to quality assurance in radiation processing with cobalt-60 gamma rays, Xrays,and electron beam. This is specifically the case for health-regulated processes, such as the radiationsterilization of single use medical devices and food irradiation for preservation and disinfestation. Polyethylene is considered to possess a lot of interesting dosimetric characteristics. In this work, adetailed study has been performed to determine the dosimetric characteristics of a commercialized highdensitypolyethylene (HDPE) film using Fourier transformed infrared spectrometry (FTIR). Correlationshave been established between the absorbed dose and radiation induced infrared absorption in polyethylenehaving a maximum at 965 cm 1 (transvinylene band) and 1716 cm 1 (ketone-carbonyl band). We have found that polyethylene dose-response is linear with dose for both bands up to1000 kGy. Fortransvinylene band, the dose-response is more sensitive if irradiations are made in helium. While, forketone-carbonyl band, the dose-response is more sensitive when irradiations are carried out in air. Thedose-rate effect has been found to be negligible when polyethylene samples are irradiated with electronbeam high dose rates. The irradiated polyethylene is relatively stable for several weeks after irradiation.
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