Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8148417 | Journal of Crystal Growth | 2018 | 14 Pages |
Abstract
CaMoO4 crystal is a promising scintillator for investigating the neutrinoless double beta decay process and is commonly grown by the Czochralski method. In this study, CaMoO4 single crystals were grown by the vertical Bridgman method using both spontaneous crystallization and seed crystal approaches. The CaMoO4 crystal grown using the spontaneous crystallization approach exhibited yellow, light blue, and deep blue colours (from top to middle part of the ingot). The thermal expansion coefficients, αa and αc, were calculated to be 6.11â¯Ãâ¯10â5/°C, and 23.58â¯Ãâ¯10â5/°C, respectively. The optical transmission spectra and photo- and thermally stimulated luminescence spectra of the crystals before and after thermal annealing were also investigated. The yellow cubic CaMoO4 crystal showed the highest x-ray-stimulated luminescence intensity and the best light output under the excitation of a 137Cs radioactive source.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Shangke Pan, Jianyu Zhang, Jianguo Pan, Guohao Ren, Jooyoung Lee, Hongjoo Kim,