scholarly journals Non-destructive analysis of in situ ammonoid jaws by synchrotron radiation X-ray micro-computed tomography

10.26879/697 ◽  
2016 ◽  
Vol 19 (3) ◽  
Author(s):  
Yusuke Takeda ◽  
Kazushige Tanabe ◽  
Takenori Sasaki ◽  
Kentaro Uesugi ◽  
Masato Hoshino
Keyword(s):  
Computed Tomography ◽  
Synchrotron Radiation ◽  
Micro Computed Tomography ◽  
X Ray ◽  
Destructive Analysis ◽  
Non Destructive

scholarly journals Damaging HMX/HTPB formulations: In-situ compression imaging using X-ray micro computed tomography

2015 ◽  
Author(s):  
Brian M. Patterson ◽  
Nikolaus Lynn Cordes ◽  
Bryce C. Tappan ◽  
Darla Graff Thompson ◽  
Virginia Warren Manner
Keyword(s):  
Computed Tomography ◽  
Micro Computed Tomography ◽  
X Ray

Non-Destructive Assaying Gold Jewellery Using Dual-Energy Micro-Computed Tomography

2015 ◽  
Vol 73 (3) ◽  
Author(s):  
Jaafar Abdullah ◽  
Abibullah Samsudin ◽  
Nor Laili Omar ◽  
Hafizza Abdul Manan
Keyword(s):  
Computed Tomography ◽  
Matrix Effects ◽  
Visual Observation ◽  
Dual Energy ◽  
Micro Computed Tomography ◽  
Tomographic Images ◽  
X Ray ◽  
Challenging Tasks ◽  
Tomography Method ◽  
Non Destructive

Determining the fineness of gold jewelleries remains one of the most challenging tasks in gold trading. The existing technology of gold testing is inadequate, allowing gold counterfeiting worldwide. The most popular non-destructive method for analysis of gold jewelleries is X-ray fluorescence technique. However, the technique is limited to surface only and it is also greatly influenced by matrix effects. In this paper, dual-energy X-ray micro-computed tomography method was proposed to assay gold jewelleries. Experimental results demonstrated that grey values of reconstructed tomographic images in combination with advanced image analysis procedures could be used to detect fake jewelleries. Due to the uniqueness of X-ray absorption, the technique was also capable of identifying different materials in gold jewelleries. Further analysis on sectioned-earrings samples using X-ray diffraction techniques and visual observation confirmed all tomographic findings.  

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