Radiacode 103 vs GQ GMC-600 Plus CPM Radiation Test Pentax SMC Takumar 55mm f1.8 Vintage Lens
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- čas přidán 30. 11. 2023
- Radiacode 103 vs GQ GMC-600 Plus CPM Radiation Test Pentax SMC Takumar 55mm f1.8 Vintage Lens. Comparing the new Radiacode 103 scintillation detector to the GQ GMC-600+ Plus Geiger Counter. We see the CPMs of radiation that is coming from an old Pentax SMC Takumar 55mm f1.8 vintage camera lens. The rear element has Thorium in the glass. It is only mildly radioactive and primarily emits alpha radiation (not gamma radiation) which has trouble even penetrating human skin.
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This is like comparing freight trucks to buses, the devices are meant for different use cases. Radiacode is mostly for working with gamma radiation, gamma spectrometry being one of its main function. Where GMC-600 Plus is meant to be more of a general use radiation detector, with ability to detect radiation all the way down to alpha particles.
If you're only interested in CPM measurements, GMC-600 Plus would be the clear choice. If you're trying to identify radioactive isotope in a sample, then you would go for Radiacode.
I have both Radiacode 101 as well as RadiaScan 701A. So sad they no longer support Radiascan further development.
I just bought the radiacode 102 and using the android app. When you start using the bluetooth app , it opens up a comprehensive software program. That will take some time to completely comprehend. A software program that should be taught at a semester of MIT. Class
Notice 600+ took 2.5 sec, the 103 took bout 7-8.5 sec
the radiacode is reading mainly gamma which is not stopped by the plastic, the Geiger is prob reading alpha and beta coming off your source which the alpha is easily stopped with the plastic.
Seems pretty close, radiacode does compensate when against hotter items
Thk!
No problem.
...You made me go over most of my (older) Nikon lenses with my Radiacode 103! Sigh, nothing interesting. Looking forward to more on your lenses, especially using the 103's spectrum data to identify the isotopes in question (mostly thorium?).
I have 6 or 7 more that are hot. One is really surprising. I will post one this week. Thorium is about all you will ever get with lenses.
I don't think I can paste a link here but if you find your way to the ORAU Museum of Radiation and Radioactivity website and navigate to Directory, Radioactive Consumer Products, Products Containing Thorium, Thoriated Camera Lenses there is a very interesting article on the topic that includes a list of common camera lenses in the class. It doesn't mention any Nikons, perhaps they didn't use the technology (I seem to recall they were known for making their own glass?).
went to the antique shop and found some old lenses in a box.
Held my gmc800 to it and sure enough one of them was radioactive!
Got it for 5 bucks 😁
Why is the lens so radioactive?! Surely this would be enough to mess up the film?
Thoriated glass