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Calcium-doped cesium iodide scintillator for gamma-ray spectroscopy

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A Correction to this article was published on 11 February 2023

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The alternative gamma-ray or X-ray detectors based on the shorter-wavelength light emission of the calcium-doped cesium iodide scintillators have been investigated by studying the effect of Ca-composition variation on the crystal structure, crystallinity, optical properties, and radiation detection performance. All characterizations show that the grown CsI crystals with an increased calcium composition in the small range of 0.20%, 1.00%, and 2.62% by EDS measurements have slightly better crystalline quality and enhanced luminescent properties with a higher luminescence yield. These improved properties lead to a bit better energy resolution of radiation measurements at the energy level of 662 keV of 17.17%. Even so, there was no significant change in the multi-emission wavelength range of 420–490 nm due to a slight calcium variation. However, the intrinsic efficiency of radiation measurement was slightly impacted. In the case of a small crystal dimension of about φ1⋅1 cm, a CsI:Ca crystal with a low Ca composition would perform the radiation measurements at low-energy gamma spectroscopy more efficiently than others. Meanwhile, a CsI:Ca crystal with a higher Ca composition could provide a slightly higher luminescence yield. Nevertheless, these CsI:Ca crystals would be one of the candidates for alternative scintillators with a shorter emission wavelength for gamma-ray spectroscopy.

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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request. However, almost data are included in this published article.

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This research was financially supported under Grant No. 46(#2/2020) by the 90th anniversary of the Chulalongkorn University Scholarship and Ratchadapisek sompot Endowment Fund No. CU_GR_62_94_21_14.

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Correspondence to Phannee Sangkaew.

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Buaban, P., Sangkaew, P., Cheewajaroen, K. et al. Calcium-doped cesium iodide scintillator for gamma-ray spectroscopy. J Mater Sci: Mater Electron 34, 96 (2023).

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