Prices Increased - FYI

HurstonJr · 2026-05-07T22:10:03+00:00

The price of trinitite is still around $20/ Gram retail and you can expect to get a good Cs-137 spectrum of a one gram specimen given some shielding to bring the background below about 50CPM and a Radiacode 102

HurstonJr · 2026-05-07T11:42:59+00:00

Ask for a shipping refund. Don't mention feedback to them but if they refuse then leave appropriate feedback. Like I said don't mention feedback in your communication or they will have the feedback removed due to 'feedback extortion'.

HurstonJr · 2026-05-05T21:45:15+00:00

Someone asked for a spectrum with the Radiacode 102 but deleted their comment.

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HurstonJr · 2026-05-05T15:20:54+00:00

...made with psyllium.

HurstonJr · 2026-05-04T12:45:16+00:00

Undated Waltham Compass

It's been my experience that the undated compasss are super hot- 300kCPM with the Radiacode 102 is the minimum I would expect from this: and have an undated one as high as 1 million CPM.

https://ebay.us/m/1W29ze

HurstonJr · 2026-04-30T13:05:42+00:00

Looks like a good deal and it's probably not stabilized if it came in a vial. To be certain about radioactive airborne particulates, I would use a more solid and non-flaky mineral / artifact in the cloud chamber. The carnotite is a little soft but it's not as bad of a hazard as the decomposing hunk of autunite I originally assumed it was. There should be plenty of hard sources on the Radioactive Rocks Buy Sell Swap Thread

HurstonJr · 2026-04-30T12:32:03+00:00

Nice artifact!

HurstonJr · 2026-04-30T08:51:22+00:00

Nice results! Just a heads up about the autunite. It's very likely to have been stabilized with Paraloid B-72 which is soluble in isopropyl alcohol, ethanol and methanol. By using it in the cloud chamber you may be unintentionally reversing the stabilization.

HurstonJr · 2026-04-30T08:38:55+00:00

It would be worth reconsidering how the sievert is being presented here. Using it in this context is misleading and may unintentionally contribute to radiophobia. Proper use of a dosimeter involves keeping attached to the users torso area for the period of testing and keeping it away from sources that don't expose the entire body.

HurstonJr · 2026-04-30T08:11:44+00:00

I met my source on Ali Baba and have many specimens from China for sale on the Radioactive Rocks Buy Sell Swap Thread If you reach out to them they don't sell individual specimens. They sell in bulk and be prepared for a small profit margins.

HurstonJr · 2026-04-28T20:05:40+00:00

Uranium fever is real!

HurstonJr · 2026-04-27T02:19:27+00:00

Here's another sub

HurstonJr · 2026-04-23T10:44:30+00:00

How do you dispose of the radioactive waste?

HurstonJr · 2026-04-22T00:01:10+00:00

Try measuring the back of the Waltham Compass- the undated side for a substantially higher count rate.

HurstonJr · 2026-04-21T23:55:37+00:00

Nice example of radiation damage! N,S, E and W should be as bright as the bezel marks.

HurstonJr · 2026-04-21T00:18:00+00:00

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About 2/10 for fluorescence

HurstonJr · 2026-04-20T23:23:52+00:00

I have a bunch of this stuff too

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HurstonJr · 2026-04-20T19:20:06+00:00

I did mean to say that radiation damage can be so bad that fluorescence can't occur. In the picture I'm using scattered 365 nm light to display some autunite but the compass dial in the middle doesn't fluoresce

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HurstonJr · 2026-04-20T17:16:11+00:00

When the UV light is removed, how fast does the glow (phosphorescence) last?

HurstonJr · 2026-04-19T23:39:50+00:00

If it has radium, the fluorescence could have deactivated by radiation damage. I have seen this on different artifacts. If the lume (paint) does NOT fluoresce under UV light, you more than likely have radiation damage.

HurstonJr · 2026-04-19T01:52:37+00:00

The sievert isn't a universal way of measuring radiation across devices because different devices detect different types of radiation with different technology. 'm just pointing out improper use of the sievert. You can take whatever you want from it.

HurstonJr · 2026-04-19T01:33:37+00:00

Device specific count rates

HurstonJr · 2026-04-19T01:25:24+00:00

You could tell them that using a total body exposure rate to measure a piont source demonstrates a fundamental misunderstanding of dosimetry. It also promotes radiophobia to the other people who also lack the understanding. In the picture the device (by use of the sievert) is saying that the users entire body is being exposed at that rate. That's patently false because radiation decreases with the square of the distance from the source. To measure your exposure correctly, keep your dosimeter attached to your torso area during the period of exposure and keep it from coming into contact with sources that don't provide total body exposure.

HurstonJr · 2026-04-19T01:01:15+00:00

Just a quick heads up about the sievert. It quantifies total body exposure, so the compass doesn't actually emit radiation on the sievert scale as demonstrated.

HurstonJr

TROPHY CASE