Crystal growth and scintillation properties of Cs2LiLuBr6:Ce3+

✍ Scribed by Sunghwan Kim; Gul Rooh; H.J. Kim; Do Sung Kim; Sang Jun Kang

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 448 KB
• Volume: 317
• Category: Article
• ISSN: 0022-0248
• DOI: 10.1016/j.jcrysgro.2011.01.018

✦ Synopsis

In this paper, we grew 1.0 mol% Ce doped Cs 2 LiLuBr 6 material as a bromo-elpasolite structured crystal. The Cs 2 LiLuBr 6 :Ce 3 + crystal was grown by the Bridgman method using a two-zone vertical furnace. We measured the luminescence and scintillation properties of the grown crystal under X-ray and g-ray excitations at room temperature. Under X-ray excitation the emission spectrum of the Cs 2 LiLuBr 6 :Ce 3 + was observed in the range of 360-540 nm, peaking at 394 and 426 nm. This emission is attributed to the 5d-4f transitions of the Ce 3 + ion. The decay time of the crystal was composed of three components. The fast component is 37 ns (35%), the intermediate component is 337 ns (25%), and the slow component is about 1.7 ms (40%). The relative light yield of the crystal was found to be 46% to that of CsI(Tl) using a bi-alkali photomultiplier tube.