선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- The BGO single crystals were grown by the Czochralski technique. For characteristics of the grown crystals, the transmission, absorption, excitation, emission, gamma-ray spectra and energy resolution measurements were carried out. The emission and excitation have a peak at around 480 nm and at 302 nm respectively, and the shape is similar to that of typical BGO.
- 05 µm) to mirror finish. In order to evaluate the characteristics of the grown BGO, we compared the properties of the grown BGO and those of the commercial BGO which was bought from AMCRYS and polished at both side on the crystal surfaces. An overview of all the crystals is shown in table 1.
- In the gamma ray measurements, six different radioactive sources, 241Am, 133Ba, 57Co, 22Na, 137Cs and 54Mn, were used in order to measure the crystal’s radiation responses.
- The surfaces of BGO crystal were optically polished to enable transmission measurements. The transmission and absorption spectra were measured using the CARY Eclipse fluorescence and CARY 300 Conc UV-visible spectrophotometer made by VARIAN. The ORTEC model 113 was used for preamplifier and model 572A for pulse shaping amplifier.
대상 데이터
- This is to prevent decomposition of the melt and corrosion of the crucible [5]. The crucible is surrounded by a RF coil, zirconia and ceramic heat-insulating material, and they were placed in a double-walled watercooled stainless-steel chamber of 350 mm in diameter and 450 mm in length. The maximum temperature that can be reached up to 1800ºC with the furnace and the temperature is stabilized within ±0.
- 5 mm/h. The starting materials used were 99.9995% pure bismuth germanium oxide powders. Pre-sintered BGO powder was melted in an inductively heated platinum crucible, 32 mm in diameter and 32 mm in length, under oxygen atmosphere.
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