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Enhancement in optical absorption of CsI(Na)

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Abstract

Discussions pertaining to enhancement in the luminous efficiency of cesium iodide (CsI) detectors doped with sodium (Na) abound. In this study, the defect structure of one Cs atom replaced by one Na atom is calculated using the ab initio method. Subsequently, the electronic band structures, densities of states, optical absorption spectra, phonons, and transport properties of CsI in perfect and defective structures are investigated. The absorption spectra of CsI with and without Na impurities are compared. It is discovered that the impurity levels in the forbidden band are generated from the shell electron distributions of the impurity atoms, not from lattice distortions. Furthermore, it is discovered that the optical absorption can be enhanced by do** CsI with Na.

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Acknowledgements

The authors thank Professor **ao-** Ouyang for his inputs pertaining to CsI scintillator experiments.

Author information

Authors and Affiliations

  1. Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Bei**g Normal University, Bei**g, 100875, China

    Wei Cheng, Pei-Sheng Liu, Min-Ju Ying & Feng-Shou Zhang

  2. Institute of Radiation Technology, Bei**g Academy of Science and Technology, Bei**g, 100875, China

    Feng-Shou Zhang

  3. National Laboratory of Heavy Ion Accelerator of Lanzhou, Center of Theoretical Nuclear Physics, Lanzhou, 730000, China

    Feng-Shou Zhang

Authors
  1. Wei Cheng
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  2. Pei-Sheng Liu
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  3. Min-Ju Ying
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  4. Feng-Shou Zhang
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Wei Cheng, Pei-Sheng Liu, Min-Ju Ying and Feng-Shou Zhang. The first draft of the manuscript was written by Wei Cheng and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding authors

Correspondence to Wei Cheng or Feng-Shou Zhang.

Additional information

This work was supported by the National Natural Science Foundation of China (Nos. 12135004, 11635003, 11961141004, and 11875088).

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Cheng, W., Liu, PS., Ying, MJ. et al. Enhancement in optical absorption of CsI(Na). NUCL SCI TECH 33, 29 (2022). https://doi.org/10.1007/s41365-022-01020-2

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  • DOI: https://doi.org/10.1007/s41365-022-01020-2

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