Simulation of irradiation uniformity for polyethylene and polypropylene in various high energy fields

Xiong, Jie; Han, Jifeng; Tian, Jie; Liu, Yi; Xi, Zhiguo; Du, Weixing; Wu, Xiaoli; Hu, Sheng; Jiang, Tao; Wang, Xiaolin

doi:10.1016/j.radphyschem.2018.05.018

Cited by 4 publications

(2 citation statements)

References 32 publications

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“…For clay used for the disposal of HLRW, g-ray irradiation seems more important due to its strong penetration. For strong penetration, g ray can even penetrate packing material and is widely used for radiation modification [55][56][57]. Exploring the effect of high-dose g-ray irradiation on muscovite seems more meaningful.…”

Section: Introductionmentioning

confidence: 99%

Intensive study on structure transformation of muscovite single crystal under high-doseγ-ray irradiation and mechanism speculation

et al. 2019

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Intensive study on structure transformation of muscovite single crystal under high-dose γ -ray irradiation is essential for its use in irradiation detection and also beneficial for mechanism cognition on defect formation within a matrix of clay used in the disposal of high-level radioactive waste (HLRW). In this work, muscovite single crystal was irradiated with Co-60 γ ray in air at a dose rate of 54 Gy min −1 with doses of 0–1000 kGy. Then, structure transformation and mechanism were explored by Raman spectrum, Fourier-transform infrared spectrum, X-ray diffraction, thermogravimetric analysis, CA, scanning electron microscope and atomic force microscopy. The main results show that variations in the chemical/crystalline structure are dose-dependent. Low-dose irradiation sufficiently destroyed the structure, removing Si–OH, thus declining hydrophilicity. With dose increase up to 100 kGy, CA increased from 20° to 40°. Except for hydrophilicity variation, shrink occurred in the (004) lattice plane which later recovered; the variation range at 500 kGy irradiation was 0.5% close to 0.02 Å. The main mechanisms involved were framework break and H 2 O radiolysis. Framework break results in Si–OH removal and H 2 O radiolysis results in extra OH introduction. The extra introduced OH probably results in Si–OH bond regeneration, lattice plane shrink and recovered surface hydrophilicity. The importance of framework break and H 2 O radiolysis on structure transformation is dose-dependence. At low doses, framework break seems more important while at high doses H 2 O radiolysis is important. Generally, variations in the chemical structure and surface property are nonlinear and less at high doses. This indicates using the chemical structure or surface property variation to describe irradiation is correct at low doses but not at high doses. This finding is meaningful for realizing whether muscovite is suitable for detecting high-dose irradiation or not, and mechanism exploration is efficient for identifying the procedure for defect formation within the matrix of clay used in disposal HLRW in practice.

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Section: Introductionmentioning

confidence: 99%

Intensive study on structure transformation of muscovite single crystal under high-doseγ-ray irradiation and mechanism speculation

et al. 2019

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“…In addition, for stronger penetration, g-ray irradiation has been widely used to investigate the radiation effect and modication. [28][29][30] Therefore, in this work, g-ray radiation was used. It should be noted that even under g-ray irradiation, the radiolysis of the solvent and damage to the impurities cannot be avoided.…”

Section: Introductionmentioning

confidence: 99%

Intensive evaluation of radiation stability of phlogopite single crystals under high doses of γ-ray irradiation

et al. 2019

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The potential of electron beams for the removal of microplastics from wastewater and sewage sludge

Siwek,

Edgecock,

Chmielewski

et al. 2023

Environmental Challenges

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Simulation of irradiation uniformity for polyethylene and polypropylene in various high energy fields

Cited by 4 publications

References 32 publications

Intensive study on structure transformation of muscovite single crystal under high-doseγ-ray irradiation and mechanism speculation

Intensive study on structure transformation of muscovite single crystal under high-doseγ-ray irradiation and mechanism speculation

Intensive evaluation of radiation stability of phlogopite single crystals under high doses of γ-ray irradiation

The potential of electron beams for the removal of microplastics from wastewater and sewage sludge

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