HOU Shuang, LIU Chun-guang, YANG Jian etc. Characterization and Storage Property of Dy<sup>3+</sup> Doped C12A7 X-ray Phosphors with Yellowish-green Emission[J]. Chinese Journal of Luminescence, 2018,39(10): 1331-1338
HOU Shuang, LIU Chun-guang, YANG Jian etc. Characterization and Storage Property of Dy<sup>3+</sup> Doped C12A7 X-ray Phosphors with Yellowish-green Emission[J]. Chinese Journal of Luminescence, 2018,39(10): 1331-1338 DOI: 10.3788/fgxb20183910.1331.
Characterization and Storage Property of Dy3+ Doped C12A7 X-ray Phosphors with Yellowish-green Emission
) X-ray phosphors with different doping concentrations were prepared by a self-propagating combustion method in combination with a heat-treatment at high temperature. For these phosphors upon 350 nm excitation
two obvious emission peaks at 486 and 575 nm
originate from the
4
F
9/2
6
H
15/2
and
4
F
9/2
6
H
13/2
transitions of Dy
3+
. As the mole fraction of Dy
3+
is 0.3%
the strongest intensities of the two emission peaks can be reached. For the C12A7:0.3% Dy
3+
phosphor heattreated at 1 300℃ in N
2
ambient for 2 h
the photostimulable luminescence intensity is enhanced and more deep traps are generated due to the decreasing encaged OH
-
anions compared to the unheattreated sample. It can be found that
under a moderate amount of X-ray absorbed dose(0.54 Gy)
high quality X-ray imaging can be realized by using an imaging object
which is two thin wires capped with insulating layer
and using an imaging plate
which is a round tablet fabricated by pressed the heattreated C12A7:0.3%Dy
3+
powders. Our results suggest that Dy
3+
doped C12A7 X-ray phosphors have a potential application for the techniques related to digital static X-ray imaging.
关键词
Keywords
references
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