Long exposure DSLR imaging of Scintillation light in LYSO Crystals

[Bobakman]

Science and Photography.
The third image is of a check source with two LYSO crystals placed over it using a bulb exposure of 15 Min at 800 ISO @ f/2.8 using my 70mm Sigma F2.8 EX DG macro lens on my Canon T5i an "Old" DSLR.
The fourth image is of the surface of the same check source in normal light arrow points to the actual isotope that was placed sealed in the disc when it was manufactured you can see its outline.
The fifth image shows the setup prior to the bulb exposure as seen through the camera lens on the cameras rear LCD display.
EDIT: I added some new images, these are the first and second images from a newer camera a Canon M200 Same lens using the Canon EF-EOSM Lens mount adapter. The M200 is a 24Mp APS-C sensor where the T5i is a 18Mp APS-C Sensor.
Bob

[iRad]

Hi Bob - Interesting photos, I have not seen this done before. I'm assuming the check source is Cs137. I wonder why the activity shows up as a ring of light in the LYSO. Is the visible blue color the natural color of the light emission from the LYSO, or was any filter used? Thanks for sharing.

[Bobakman]

Yes a 37.8 year old Cs-137 Check Source. Less than 5 mci now.
Evidently the light pattern must be due to the geometry of whatever the source material was, my best guess.
No filters were used just a bit of post processing in Photoshop to remove some of the image sensor noise.
Bob