Spectroscopy and Spectral Analysis, Volume. 37, Issue 5, 1566(2017)
Fabrication and Performance of Pixelated γ-CuI Scintillation Conversion Screens Based on Oxidized Silicon Micropore Arrays
The pixelated CuI scintillation conversion screens which have a monodisperse micro-columnar structure were fabricated with pressure-injection method using the high-purity CuI powder and oxidized silicon micropore arrays. The results of scanning electron microscopy and X-ray diffraction show that CuI micro-columns are continuous and dense with the crystal lattice of (-phases. Their diameters, spaces and depths are about 2.5, 1.5 and 80 μm, respectively. X-ray excited luminescence (XEL) reveals that the as-prepared γ-CuI scintillation screens have an emission band near 680 nm, which has a comparatively slow decay time. After iodine-doping especially at the content of 10 Wt%, the emission band near 680 nm is effectively suppressed with an emission peak at 432 nm, which has an ultra-fast decay time. The spatial resolution of the pixelated γ-CuI scintillation conversion screens was measured with knife-edge method. The result shows that the resolution can reach to 38 lp·mm-1, which indicate that the pixelated γ-CuI scintillation screens have excellent spatial resolution with ultra-fast time response and it possess a unique value in X-ray imaging.
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SUN Shou-qiang, GU Mu, CHEN Ting-ting, ZHANG Juan-nan, LIU Xiao-lin, LIU Bo, HUANG Shi-ming, NI Chen. Fabrication and Performance of Pixelated γ-CuI Scintillation Conversion Screens Based on Oxidized Silicon Micropore Arrays[J]. Spectroscopy and Spectral Analysis, 2017, 37(5): 1566
Received: Oct. 9, 2015
Accepted: --
Published Online: Jun. 20, 2017
The Author Email: Shou-qiang SUN (ssqaxq1991@163.com)