Title :
Fabrication and Performance of Columnar CsI(Tl) Scintillation Films With Single Preferred Orientation
Author :
Dalin Yao ; Mu Gu ; Xiaolin Liu ; Shiming Huang ; Bo Liu ; Chen Ni
Author_Institution :
Shanghai Key Lab. of Special Artificial Microstructure Mater. & Technol., Tongji Univ., Shanghai, China
Abstract :
CsI(Tl) scintillation films with columnar structure are now widely used for X-ray imaging. In this work, CsI(Tl) films were manufactured on glass substrates by the thermal deposition method. The influence of deposition conditions on the microstructure and crystalline property of the films was studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The films showed only (200) plane preferred orientation when deposited at low vacuum. The light outputs were evaluated. The films with only one preferred orientation showed better luminescence performance than that with several crystal planes. In addition, the spatial resolution of samples was given in terms of modulation transfer function (MTF).
Keywords :
X-ray apparatus; X-ray diffraction; X-ray imaging; crystal microstructure; luminescence; optical transfer function; scanning electron microscopy; solid scintillation detectors; substrates; X-ray diffraction; X-ray imaging; columnar CsI(Tl) scintillation films; columnar structure; crystal planes; crystalline property; deposition conditions; glass substrates; light outputs; luminescence performance; microstructure; modulation transfer function; plane preferred orientation; scanning electron microscopy; single preferred orientation; spatial resolution; thermal deposition method; Heating; Imaging; Spatial resolution; Substrates; Surface treatment; X-ray imaging; X-ray scattering; Columnar structure; CsI(Tl) scintillation film; preferred orientation; spatial resolution;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2013.2256368
