Using X-Rays

Using X-Rays

Using X-Rays

Analytical x-ray facility

We now have

The Avaatech XRF performs non-destructive analysis of elements Al through Ba. The samples we measure with the XRF range from split cores (both marine and lacustrine), slabbed cores, U-channel samples, tree cores, coral slabs, rock slabs and discrete samples. Samples can be scanned at a resolution of 0.1mm to 10mm, so even the finest laminations in sediment cores can be accounted for individually. The XRF also has a Line Scan camera that generates very high definition images of samples. Color data, in the form of RGB and CIE, can also be pulled from these images for use in analyses, such as changes in lithology or deposition type. The Line Scan camera can be outfitted with ultra-violet (UV) lights and a filter in order to image samples, such as coral slabs, in the UV. In the XRF, the sample stays stationary, while the x-ray source and detector and Line Scan camera pass over the sample during scanning and imaging, respectively. They XRF is in high demand by researchers across the UC system, as well as far outside of UC. Scientists at the USGS, CICESE in Ensenada, Mexico, and other institutions and universities outside of CA are interested in using the XRF for analysis of their samples.

The GeoTek MSCL-XR x-ray imaging machine can be used to image unplit cores, as well as split cores. It is helpful to image unsplit cores to understand what the internal composition of the sediments is like before splitting, so, for example, we can tell if there are large stones to be aware of while splitting, or sandy intervals. The GeoTek imager can be used for any kind of sample, not just marine cores, like coral slabs, sponges, box core slabs and rock slabs. In this machine, the x-ray source and detector stay stationary and the sample being imaged passes through them. X-ray images of samples can give great insights into the internal structure of samples and can reveal information like the changes in depositional content in sediment cores, the occurrence of flood deposits, the formation of growth bands in corals, and much more.

We like to use the images produced by the GeoTek MSCL-XR x-ray imaging machine in association with the chemical data and Line Scan images from the Avaatech XRF where possible to elucidate as much as possible about samples we are working with.

To find more information about using our instruments and what the associated costs are, contact:

Alex Hangsterfer, Collections Manager.
Email: ahangsterfer@ucsd.edu

 

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