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Growth of lead iodide single crystals used for nuclear radiation detection of Gamma‐rays
Author(s) -
Liu Jing,
Zhang Yu
Publication year - 2017
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201600370
Subject(s) - wafer , materials science , infrared , single crystal , radiation , graphite , electrical resistivity and conductivity , crystal growth , gamma ray , particle detector , crystal (programming language) , irradiation , iodide , optics , optoelectronics , analytical chemistry (journal) , chemistry , crystallography , composite material , physics , programming language , organic chemistry , chromatography , quantum mechanics , astrophysics , computer science , nuclear physics
PbI 2 single crystals have been fabricated by vertical Bridgeman (VB) method and vertical gradient freezing (VGF) method. The crystal grown by the VGF method exhibited high quality with no stress cracks and high infrared transmission rate compared with the one grown by VB method. A transparent orange PbI 2 single crystal with size of Φ20 mm×80 mm was obtained by the improved parameters. Electrical resistivity of the crystal was as large as 1.4×10 11 Ωcm, and the infrared transmission rate was as high as 53% in the wave‐numbers from 4000 to 400 cm −1 . The wafer was deposited with graphite explode, and the photopeak was very sharp with the shaping time of 2.7 μs to detect 241 Am@59.5 keV γ‐rays.