Study of lyoluminescence of gamma-irradiated GdCa4O(BO3)3:Ce phosphors: Mass of solute and pH of solvent as a key factor

Mishra, G. C.; Dhoble, S.J.; Srivastava, Ashok; Dwiwedi, Surendra Kumar; Kher, R. S.

doi:10.1016/j.ijleo.2017.12.189

Cited by 7 publications

(2 citation statements)

References 12 publications

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“…In spite of this, measured LL intensity profiles exhibit maxims in 1.3 µm region due to the heterogeneous solvent -solid substance interactions during the dissolution of irradiated sample or surface effects on radiation damage. The second of both mentioned possibilities was pointed out in [11] discussing the influence of single crystal surface upon formation of radiation in irradiated alkali halides as well in inorganic salts [12][13][14][15][16][17][18][19][20][21][22]. Direct micro spectrophotometric measurements of radiation damage profiles of accelerated ions LiF [7] also indicates increased concentration of F and F3 centres in the surface region.…”

Section: (C) Ionsmentioning

confidence: 99%

Dosimetry of Charged Particles Using Lyoluminescence Method

Lescinskis¹,

Ķizāne²,

Supe³

et al. 2017

Phys. Sci. Technol.

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Interaction of charged particles -protons, nitrogen, oxygen and carbon ions with LiF single crystals were studied using lyoluminescence method. Obtained linear energy transfer profiles were compared with those ones calculated by Monte Carlo method. The shape of the calculated and measured profiles was found to be comparable with Brag's curve. Analyses of differences in shape of calculated and experimentally measured curves were performed. It is demonstrated that by gradually dissolving the crystal in the form of a disk, rotating it with constant angular rate around its axis of symmetry, it is possible to determinate the defect distribution over the crystal depth with a resolution of the order of 1µm according to measurements of lyoluminescence intensity. Also, a good precision of lyoluminescence intensity measurement and agreement of experimental energy loss profiles with the theoretical ones are noted. Significant deviations from calculated profiles were observed in distances closer than 10 -6 m to solid surface.

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Section: (C) Ionsmentioning

confidence: 99%

Dosimetry of Charged Particles Using Lyoluminescence Method

Lescinskis¹,

Ķizāne²,

Supe³

et al. 2017

Phys. Sci. Technol.

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“…Lyoluminescencce yield depends on many parameters such as gamma dose, particle size of the sample, amount of the solute, amount of the solvent, pH value of the solvent, temperature of the surroundings, etc. [3].…”

Section: Introductionmentioning

confidence: 99%

Lyoluminescence Dosimetry of L-Proline Incorporated of Sensitizer Dependence on the Temperature and pH of Solution

Abdulqader

Alhasan

2019

eijs

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To increase the sensitivity of dosimeter, it has to improve the properties that are required to increase its sensitivity. It was proven that the dependence of lyoluminscence (LL) of irradiated amino acid (L-prolin) incorporated with chemiluminscence reagent (luciginine) on the pH and temperature of the solution. LL means the emission of light from dissolved material in a suitable solvent, which is previously exposed to ionizing radiation. When the incorporated phosphor irradiated to gamma rays an electronically excited species are trapped within the solid matrix, this extra energy will be emitted in the form of light ( 420-500nm), on dissolving the material in water in this test. The LL intensity increases with increasing pH of the solution. The best reproducible and optimum LL intensity is at (pH=8.5-9) of the solution, However, LL intensity will be decreased when the PH is higher than 12. In this value of pH the stability of free radicals is optimum. The same is found for solvent temperature dependence, the optimum LL intensity is at 45-48 oC. LL intensity will increase up to 70 oC,it was found that the total glow increased because of increasing the self-glow of luciginine , but LL intensity will decrease because of dissociation of phisphore structure. In addition to the self-glow of the sanitizer will increase too at temperate up to 70 oC , however, that will cause self-glow to the dosimeter material.

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Introduction to luminescence

Nair¹,

Dhoble²

2021

The Fundamentals and Applications of Light-Emitting Diodes

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Study of lyoluminescence of gamma-irradiated GdCa4O(BO3)3:Ce phosphors: Mass of solute and pH of solvent as a key factor

Cited by 7 publications

References 12 publications

Dosimetry of Charged Particles Using Lyoluminescence Method

Dosimetry of Charged Particles Using Lyoluminescence Method

Lyoluminescence Dosimetry of L-Proline Incorporated of Sensitizer Dependence on the Temperature and pH of Solution

Introduction to luminescence

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