| 论文简介 |
High resolution, high efficiency liquid scintillator capillary array for gamma imaging
Mei Zhang,1,2 Huasi Hu,1,a) Kuinian Li,2 Bodong Peng,2 Liang Sheng,2
Dongwei Hei,2 and Yang Li2
1School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute
of Nuclear Technology, Xi’an 710024, China
(Received 15 February 2018; accepted 8 July 2018; published online 30 July 2018)
We fabricated a liquid scintillator capillary array (LSCA) for gamma imaging with the aim of developing
a one-dimensional detector system utilizing a streak camera for high temporal and spatial resolution
pulsed gamma radiation detection. The detector’s performance was studied in a simulation and via
an experiment. The maximum efficiency of the LSCA’s emission was at a wavelength of 420 nm. To
establish a high fidelity representation of the detector’s edge spread function and modulation transfer
function (MTF), a slanted edge algorithm was introduced to calculate the edge spread function of the
discrete sampling array’s image screen. The simulation results showed that the spatial resolution of the
LSCA was better for 14 MeV neutrons than for 1.25 MeV gamma radiation. The experimental results
show that in comparison with a 6-mm-thick LaBr3 image plate, the LSCA had a higher temporal and
spatial resolution when used as a gamma detector. The spatial resolution was 1.1 lp/mm (MTF = 0.1)
for the LSCA. In addition, when an ultra-violet streak camera was coupled with the LSCA, it had
a comparable sensitivity to that of a 6-mm-thick LaBr3 image plate. Published by AIP Publishing
https://doi.org/10.1063/1.5026131 |
(创新港)
