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Your search keyword '"Lee P. H."' showing total 89 results
Start Over Author "Lee P. H." Journal journal of the korean physical society
89 results on '"Lee P. H."'

1. Status of the RAON heavy-ion accelerator

Author

Chung, Y. S., Kang, J., Kwon, M., Kwon, E., Kwon, J. W., Kim, G. D., Kim, D. G., Kim, M. S., Kim, S., Kim, Y., Kim, Y. H., Kim, Y., Kim, J. W., Kim, J., Kim, H., Kim, H. J., Kim, H., Do, H., Park, M. J., Park, B. S., Park, I., Park, H., Bae, S. Y., Baek, B. Y., Seo, C. S., Seol, K. T., Son, K. T., Son, C., Son, H. J., Shin, J. H., Ahn, Y., Yang, K. S., Woo, H. J., Yoo, J. H., Yoon, J., Lee, D. Y., Lee, M. K., Lee, S. -. G., Lee, Y. H., Lee, J. W., Lee, J., Lim, E. H., Jang, J. H., Jang, H. M., Jang, H., Jeon, D., Jeon, S., Jung, Y., Jung, H. C., Jo, K. H., Jo, H. C., Jo, Y. W., Cho, J. H., Joo, J. D., Jin, H., Choi, S., Choi, O., Choi, Y. J., Choi, J. W., Choi, C. J., Han, J., Heo, J. I., Hyun, M. O., Hong, I. S., Ki, T., Kim, D. M., Moon, S., Yoon, S., Lee, S., and Choi, H. S.

Published
2024
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17. Study of 19F Levels with Ex = 6.7 - 7.7 MeV by the 15N+α Scattering Experiment

Author

Kim, D., Kim, G. W., Park, S. Y., Kim, A., Hahn, K. I., Abe, K., Beliuskina, O., Hayakawa, S., Imai, N., Kitamura, N., Sakaguchi, Y., Yamaguchi, H., Cha, S. M., Chae, K. Y., Kwag, M. S., Hong, S. W., Lee, E. J., Lee, J. H., Lee, E. K., Moon, J. Y., Bae, S. H., Choi, S. H., Kubono, S., Panin, V., Wakabayashi, Y., Iwasa, N., Kahl, D., and Chen, A. A.

Published
2018
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19. The improvement of piezoelectric properties in BiFeO3–BaTiO3lead-free ceramics prepared with heat-treated rutile TiO2

Author

Kim, D. J., Lee, M. H., Kim, J. S., Choi, H. I., Lee, Soonil, Kim, M.-H., and Song, T. K.

Abstract

BiFeO3–BaTiO3lead-free piezoelectric ceramics have been studied for their application to sensors and actuators. The high strain and piezoelectric actuator coefficient (d33*) are observed in tetragonal 0.60BiFeO3–0.40BaTiO3ceramic with heat-treated single-phase rutile titanium dioxide (TiO2) powders than in ceramic with commercial mixed-phase with rutile and anatase TiO2. The optimized sintering temperature is 1010 °C with the quenching process. The increase of the grain size in microstructure, higher tetragonal phase volume fraction, and higher tetragonality are observed in ceramic with rutile TiO2than in ceramic with commercial TiO2. The maximum strain is 0.316%, and d33* is 576 pm/V. A high Curie phase transition temperature of 355 °C is measured with the maximum dielectric constant (εr,max) about 30% higher than that of ceramic with commercial TiO2. It is found that the single-phase starting material is important to improve piezoelectric, ferroelectric, and dielectric properties in lead-free piezoelectric ceramics.

Published
2024
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30. Synthesis and characterization of ZnGa2O4:Cr3+Ge3+compounds with tunable photoluminescence properties

Author

Kumar, Pankaj, Sharma, Aditya, Bishnoi, Priyanka, Vij, Ankush, Kumar, Sandeep, Shin, Hyun-Joon, Chae, K. H., Lee, B. H., and Won, S. O.

Abstract

Pure and doped (Cr and Ge) ZnGa2O4compounds are prepared using solid-state reaction method. Single-phase nature of pure and doped ZnGa2O4compounds is investigated using X-ray diffraction (XRD). XRD results indicate lower theta angle shifting, decrease in particle size and tensile strain in the doped samples. A granular morphology of amalgamated particles is seen in the SEM images. EDS results convey, practically, the same concentrations (atm%) of doped elements as used during the preparation. X-ray absorption near-edge structure (XANES) results helped to determine the valence state of elements. O K-edge XANES shows a significant orbital hybridization of O 2pshells with the dshells of doped atoms (i.e., Cr and Ge). Broad PL bands, of nearly the white-light emission, are observed in all of the samples. Modification in the PL intensity and emitted wavelengths, upon doping of Cr3+and Ge3+ions, are discussed through the energy transfer mechanisms and defects in the compounds.

Published
2023
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33. Design of the RAON accelerator systems

Author

Jeon, D., Hong, I. S., Kim, H. J., Kim, J. W., Bodenstein, R. M., Cha, H. J., Choi, S. J., Choi, S., Choi, O. R., Do, H., Choi, B. H., Choi, C. J., Han, J., Han, W. K., Hyun, M. O., Jang, H., Joo, J. D., Joung, M. J., Jung, H. C., Jung, Y. C., Kim, D. G., Kim, E., Kim, H., Kim, H. J., Kim, J. H., Kim, J. Y., Kim, W. K., Kim, Y., Kim, Y., Kim, M., Kim, M. J., Lee, J. H., Lee, K. W., Lee, M. K., Park, G. T., Ryu, S., Shin, I., Shin, J. H., Song, J. -S., Yoon, S., Yi, K. -H., Yun, C. C., Zaghloul, A., Kim, S. K., Matlabjon, S., Park, G. S., Bahng, J. B., Hwang, J. G., Jang, S. W., and Kim, E. S.

Published
2014
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