Growth and Scintillation Properties of La(Cl0.05 Br0.95 )3 :Ce Crystal
BAO Han-Bo, QIN Lai-Shun, DING Yan-Guo, LI Zheng-Guo, SHI Hong-Sheng** , SHU Kang-Ying**
College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018
Abstract ：The growth and scintillation properties of La0.97 (Cl0.05 Br0.95 )3 :Ce0.03 crystals are reported. A 1-inch-diameter as-grown crystal is achieved by applying the vertical Bridgman technique, and one machined single crystal with sizes 18 mm× 8 mm× 8 mm is acquired. The scintillation properties of La0.97 (Cl0.05 Br0.95 )3 :Ce0.03 crystals are presented. Under the excitation of UV (ultraviolet) light, the crystal exhibits two luminescent peaks centered at 358 nm and 382 nm. The light output is about 62000 ph/MeV while the energy resolution (ΔE/E ) of this crystal at 662 keV is 4.55% of the full width at half-maximum. Additionally, the crystal photoluminescence decay time constant is 17.7 ns, which is significantly faster than that of LaBr3 :Ce. The results indicate that the LaCl3 3 x y 1?y )3 :Ce1?x crystal is potentionally a promising scintillator.
收稿日期: 2013-05-07
出版日期: 2013-11-21
:
81.10.Fq
(Growth from melts; zone melting and refining)
81.10.-h
(Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
78.70.Ps
(Scintillation)
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