A study on energy dependence of nano barium sulfate powder using the EPR technique in photon, electron and proton beams

Aboelezz, E.; Angelis, C. De; Fattibene, P.

doi:10.1016/j.measurement.2021.109108

Cited by 13 publications

(4 citation statements)

References 39 publications

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“…The EPR response of materials as a function of different radiation qualities is a critical challenge, hence nano-BaSO 4 response against radiation quality (6 and 15 MV photons, 6 and 16 MeV electrons, 35 MeV protons, and 137 Cs as a reference beam), dose range from 0.3 to 55 Gy, was explored. 118 It was reported that despite no beam quality affected linearity of dose response and signal line shape, the slopes of all beams have been differed substantially. The energy dependence factor was estimated to be about 0.6 for protons, 0.70 for electrons, near to unity for 6 MV photons and 0.87 for 15 MV photons.…”

Section: Enhancement Of Various Radiation Dosimetry Systems Using Nan...mentioning

confidence: 99%

“…A comparison of measured energy dependence factors for nano-BaSO 4 and the EPR reference dosimeter (alanine) from the literature is shown in Table 4 of Ref. 118 . According to the findings, nano-barium sulfate has a significant energy dependency, necessitating the use of energy dependence correction factors when employing this material for dosimetry.…”

Section: Enhancement Of Various Radiation Dosimetry Systems Using Nan...mentioning

confidence: 99%

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Review of nanomaterial advances for ionizing radiation dosimetry

Aboelezz

Pogue

2023

Applied Physics Reviews

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There are a wide range of applications with ionizing radiation and a common theme throughout these is that accurate dosimetry is usually required, although many newer demands are provided by improved features in higher range, multi-spectral and particle type detected. Today, the array of dosimeters includes both offline and online tools, such as gel dosimeters, thermoluminescence (TL), scintillators, optically stimulated luminescence (OSL), radiochromic polymeric films, gels, ionization chambers, colorimetry, and electron spin resonance (ESR) measurement systems. Several future nanocomposite features and interpretation of their substantial behaviors are discussed that can lead to improvements in specific features, such as (1) lower sensitivity range, (2) less saturation at high range, (3) overall increased dynamic range, (4) superior linearity, (5) linear energy transfer and energy independence, (6) lower cost, (7) higher ease of use, and (8) improved tissue equivalence. Nanophase versions of TL and ESR dosimeters and scintillators each have potential for higher range of linearity, sometimes due to superior charge transfer to the trapping center. Both OSL and ESR detection of nanomaterials can have increased dose sensitivity because of their higher readout sensitivity with nanoscale sensing. New nanocrystalline scintillators, such as perovskite, have fundamentally important advantages in sensitivity and purposeful design for key new applications. Nanoparticle plasmon coupled sensors doped within a lower Zeff material have been an effective way to achieve enhanced sensitivity of many dosimetry systems while still achieving tissue equivalency. These nanomaterial processing techniques and unique combinations of them are key steps that lead to the advanced features. Each must be realized through industrial production and quality control with packaging into dosimetry systems that maximize stability and reproducibility. Ultimately, recommendations for future work in this field of radiation dosimetry were summarized throughout the review.

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Section: Enhancement Of Various Radiation Dosimetry Systems Using Nan...mentioning

confidence: 99%

Section: Enhancement Of Various Radiation Dosimetry Systems Using Nan...mentioning

confidence: 99%

Review of nanomaterial advances for ionizing radiation dosimetry

Aboelezz

Pogue

2023

Applied Physics Reviews

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“…The precipitation conditions of an ionic solid were regarded to impact the appearance or behavior of the crystals formed substantially. It was well established that foreign ions could change the crystal behavior [33,34]. It was previously observed that foreign ions were mixed crystals of the precipitates, causing definite changes in habit modification.…”

Section: Crystal Morphology Of Barium Sulfatementioning

confidence: 99%

The Effect of Sr<sup>2+</sup> and Fe<sup>3+</sup> Cations and the Stirring Speed on The Precipitation of Barium Sulfate in a Batch System

Susilowati,

Karaman,

Prayuga

et al. 2023

Atom Indo.

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The batch system investigation explored the effect of Sr2+ and Fe3+ cations and the stirring speed on the characteristics of precipitated barium sulfate. A series of experiments were conducted to evaluate the rate of barium sulfate precipitation in laboratory equipment from brines containing barium ions (3500 ppm) and varying amounts of Sr2+ and Fe3+ ions (10 and 20 ppm). Kinetic analysis was also performed to explore how stirring speeds (240 and 480 rpm) affect barium sulfate scales' crystallization by increasing the stirring speed and promoting Sr2+ and Fe3+-cation solubility while decreasing the precipitation rate. All solid crystals obtained were mostly pure barite, as the X-ray diffraction (XRD) method confirmed. The SEM micrograph of barite morphology revealed particles with tablet-shaped crystals 2 to 5 nm in size. With the presence of Sr2+ and Fe3+-cation, the shape of barium sulfate was modified into spherical tablets or flower-like clusters of tablets. Meanwhile, the morphological changes could result from increased stirring rates. Moreover, the kinetic results yielded a general reaction rate equation that might be used to estimate barium sulfate deposition in pipelines for various brine, supersaturation, and mixing time durations.

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“…In order to improve the compatibility between the inorganic filler and the organic matrix, the surface of the inorganic filler needs to be modified by grafting with polymeric organic substances. [6][7][8][9][10] In this study, the polymerization of methyl methacrylate is initiated by free radicals, and the surface of nano-barium sulfate has been grafted with polymethyl methacrylate (PMMA), thus effectively solving the problem of nanobarium sulfate surface modification. Only a few papers on this type of chemistry have been reported to date.…”

Section: Introductionmentioning

confidence: 99%

A study on the modification of nano-barium sulfate using a grafting method

Liu,

Li,

2023

Journal of Chemical Research

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In this paper, the wet modification method is compared with the grafting method to modify nano-barium sulfate. The effects of the modification method, the modification time, the modifier dosage, the modification temperature, and other factors on the degree of activation of modified nano-barium sulfate are investigated to solve the nano-barium sulfate agglomeration problems and to make it a suitable process for industrial production. Thermogravimetric analysis, infrared spectroscopy, and scanning electron microscopy are used to characterize the morphology and encapsulation of modified nano-barium sulfate. The grafting method is used to modify nano-barium sulfate with a modification time of 120 min, a modifier dosage of 27%, and a modification temperature of 80 °C. From the experimental results, a hydrophobic nano-barium sulfate in powder form with 76.86% activation degree and 77.41% oil absorption value is obtained.

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A study on energy dependence of nano barium sulfate powder using the EPR technique in photon, electron and proton beams

Cited by 13 publications

References 39 publications

Review of nanomaterial advances for ionizing radiation dosimetry

Review of nanomaterial advances for ionizing radiation dosimetry

The Effect of Sr<sup>2+</sup> and Fe<sup>3+</sup> Cations and the Stirring Speed on The Precipitation of Barium Sulfate in a Batch System

A study on the modification of nano-barium sulfate using a grafting method

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