Identification of Pearl Based on X-Ray Transmission Imaging and Fluorescence Dual Mode

Shang-kun SHAO; Xue-peng SUN; Xiao-guang DU; Yu-fei LI; Ya-bing WANG; Xiao-yun ZHANG; Zhi-guo LIU; Tian-xi SUN

doi:10.3964/j.issn.1000-0593(2020)12-3936-05

Spectroscopy and Spectral Analysis, Volume. 40, Issue 12, 3936(2020)

Identification of Pearl Based on X-Ray Transmission Imaging and Fluorescence Dual Mode

Shang-kun SHAO^1,1、*, Xue-peng SUN^1,1, Xiao-guang DU^1,1, Yu-fei LI^1,1, Ya-bing WANG^1,1, Xiao-yun ZHANG^1,1, Zhi-guo LIU^1,1, and Tian-xi SUN^1,1

Author Affiliations

¹[in Chinese]

¹1. Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China

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Figures & Tables(7)

Fig. 1. Composition of dual-mode system of XRF and transmission X-ray imaging

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Fig. 2. Pearls identification process

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Fig. 3. Grayscale image of partial sample

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Fig. 4. The XRF spectrum of freshwater pear

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Fig. 5. The XRF spectrum of seawater pearl

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Table 1. Thresholds of average attenuation coefficient

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Table 1. Thresholds of average attenuation coefficient

Between two samples	Threshold value of average attenuation coefficient/cm^-1
ABS Pearl and PMMA Pearl	2.407 0
PMMA Pearl and Glass Pearl	3.525 1
Glass Pearl and Roman Pearl	4.532 8
Roman Pearl and Pearl	5.788 8
Pearl and Shell Pearl	7.047 6

Table 2. Average attenuation coefficient of samples

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Table 2. Average attenuation coefficient of samples

No.	Sample	Diameter /mm	μ_eq/cm^-1	Sr-Kα/ Ca-Kα
A	Black freshwater pearl	7.4	6.961 3	0.777 6
B	Black freshwater pearl	5.4	6.951 3	0.739 2
C	Pink freshwater pearl	9.8	6.581 5	0.604 2
D	Pink freshwater pearl	7.9	6.254 1	0.842 2
E	White freshwater pearl	8.0	5.951 3	0.842 2
F	Black seawater pearl	8.1	6.953 2	1.371 3
G	Black seawates pearl	8.8	6.408 1	1.398 0
H	Yellow seawater pearl	7.5	6.074 6	1.242 3
I	Yellow seawater pearl	6.9	6.581 6	1.472 5
J	White seawater pearl	8.0	6.252 3	1.280 0
K	Glass Pearl (hole)	8.0	3.848 8	-
L	Glass Pearl (hole)	8.0	3.952 3	-
M	Glass Pearl (hole)	8.1	3.925 9	-
N	Shell Pearl (hole)	7.2	7.875 3	-
O	Shell Pearl (hole)	6.4	7.836 5	-
P	ABS Pearl (hole)	7.5	1.920 4	-
Q	ABS Pearl (hole)	8.0	1.898 6	-
R	ABS Pearl (hole)	6.0	1.937 8	-
S	PMMA Pearl (hole)	7.8	2.668 9	-
T	PMMA Pearl (hole)	7.9	2.675 8	-
U	PMMA Pearl (hole)	6.0	2.710 6	-
V	Roman Pearl (alabaster)	8.1	4.896 8	-
W	Roman Pearl (alabaster)	8.0	4.865 3	-
X	Roman Pearl (alabaster)	8.0	4.879 9	-

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Shang-kun SHAO, Xue-peng SUN, Xiao-guang DU, Yu-fei LI, Ya-bing WANG, Xiao-yun ZHANG, Zhi-guo LIU, Tian-xi SUN. Identification of Pearl Based on X-Ray Transmission Imaging and Fluorescence Dual Mode[J]. Spectroscopy and Spectral Analysis, 2020, 40(12): 3936

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Paper Information

Category: Research Articles

Received: Sep. 20, 2019

Accepted: --

Published Online: Jun. 18, 2021

The Author Email: Shang-kun SHAO (shaoshangkun@163.com)

DOI:10.3964/j.issn.1000-0593(2020)12-3936-05

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