|
KMID : 0357520140370040253
|
|
Journal of Radiological Science and Technology
2014 Volume.37 No. 4 p.253 ~ p.259
|
|
|
Fabrication of Virtual Frisch-Grid CdZnTe γ-Ray Detector
|
|
Park Chan-Sun
Kim Pil-Su
Kim Jung-Min
Kim Ki-Hyun
Choi Jong-Hak
Cho Pyong-Kon
|
|
|
Abstract
|
|
|
Large volume of 6×6×12 mm3 CdZnTe γ-ray detector was fabricated with CdZnTe single crystals grown by Traveling Heater Method (THM) to evaluate the energy resolution of 662 keV in 137Cs. Hole tailing effect which originated from the large mobility difference in electron and hole degrade energy resolution of radiation detector and its effects become more severe for a large volume detectors. Generally, single carrier collection technique is very useful method to remove/minimize hole tailing effect and thereby improvement in energy resolution. Virtual Frisch-grid technique is also one of single charge collection method through weighting potential engineering and it is very simple and easily applicable one. In this paper, we characterized CZT detector grown by THM and evaluated the effectiveness of virtual Frisch-grid technique for a high energy gamma-ray detector. The proper position and width of virtual Frisch-grid was determined
from electric field simulation using ANSYS Maxwell ver. 14.0. Energy resolution of 2.2% was achieved for the 662 keV γ-peak of 137Cs with virtual Frisch-grid CdZnTe detector.
|
|
|
KEYWORD
|
|
|
CdZnTe, virtual Frisch-grid, spectroscopy, X- and γ-ray detector
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|