CAJ | 학술논문

用氯化铵氯化法制备出高纯无水氯化镧(铈)粉料,并以其为原料,用石英坩埚下降法生长出无色透明的掺3价铈的氯华镧(LaCl3:Ce)晶体.经测试,LaCl3:Ce样品的透过率达到80%,用137Cs发射源发射的γ射线激发LaCl3:Ce样品,得到的能量分辨率约为3.5%,晶体的光产额约为(6 510±50) photon-electrons/MeV,与碘化钠(铊)晶体(NaI:T1)相当.晶体的光学性能和闪烁性能表明:采用氯化铵氯化法制备的无水氯化镧(铈)粉料可直接用于晶体生长,而且生长出了高质量的LaCl:Ce晶体.
용록화안록화법제비출고순무수록화란(시)분료,병이기위원료,용석영감과하강법생장출무색투명적참3개시적록화란(LaCl3:Ce)정체.경측시,LaCl3:Ce양품적투과솔체도80%,용137Cs발사원발사적γ사선격발LaCl3:Ce양품,득도적능량분변솔약위3.5%,정체적광산액약위(6 510±50) photon-electrons/MeV,여전화납(사)정체(NaI:T1)상당.정체적광학성능화섬삭성능표명:채용록화안록화법제비적무수록화란(시)분료가직접용우정체생장,이차생장출료고질량적LaCl:Ce정체.
Highly pure and anhydrous lanthanum cerium chloride powders were prepared by the ammonium chloride chlorination process. Colorless and transparent lanthanum chloride crystals doped with Ce3+ (LaCl3:Ce) were grown from the melt of the powders in sealed fused-silica crucibles by the Bridgman technique. The transmittance of the LaCl3:Ce crystal sample reaches as high as 80%;its energy resolution is 3.5% under γ-ray excitation of 137Cs radioactive source, and its light yield is about (6 510±50) photon-electrons/MeV, approximately equal to that of NaI:TI crystal. These data on its optical and scintillation properties show that the powder ob-tained by this process can be used as a raw material for growing LaCl3:Ce crystal with high quality.