Mr Blinky

I want to build a radiation shielded chamber for Gamma spectroscopy using my Radiacode 103. After batting some ideas about on another thread this is what I have so far: Outer case is 6mm steel (mild steel) - This could be a square tube section, or made from sheet. Inner case is the same as the outer and has 60mm x 60mm to 75mm x 75mm (thereabouts) space in the center for the Radiacode and source. Internal length of the chamber will be ~200mm. Space between the inner case and outer case will be filled with lead, ~25mm thick. Tabs/flange on both caps and outer case to put bolts through to fix

Here is a 12 hour spectrum accumulated on the Radiacode 103 of a spicy Sr-90 (Strontium-90) check source (~100-200 Bq) from a DP-5 Geiger counter. Both Lin and Log are shown. Archived from radmon.org - originally posted 06/04/2025

Experiment - Capturing Radon progeny from Uraninite (Uranium ore) This should be quite interesting to anyone that owns or is thinking of owning Uraninite (Uranium ore) sources, and anyone with a keen interest in Radon. TL;DR - Skip to the last part for safety concerns with U-238 sources and also Thorium gas mantles, Thorium dioxide. This was a fairly well controlled experiment that was carried out at home, and using ChatGPT as my lab sidekick. The idea was to capture Radon progeny from 4.46g of Uraninite (Uranium ore) and prove the decay products. Uraninite emits Radon gas and this decays

I have just picked up a couple of Mullard MX-124 GM tubes on ebay for a song! I originally bid a fair amount that I immediately regretted, but when the auction finished I got them for a really good price! There were two tubes in the auction and one came with original datasheet and Mullard guarantee . They are quite unusual in they are designed to detect radiation in liquids. Their construction is like a glass walled GM tube inside a test tube, with a stopper on the end. They are to be used in a vertical position and the liquid poured into the top of the tube and the liquid will run down to

The Radiacode website has a great isotope spectrum library: https://www.radiacode.com/spectrum-isotopes-library All of the spectrums are from the mobile app for the Radiacode so don't have a massive amount of detail, but there is some great information for each isotope, such as half life, emission lines and a decent description of where they may be detected. Archived from radmon.org - originally posted 12/12/2024

For all of the posts in the Negative Ion Energy Ju-Ju series, click here. A radmon.org user arranged some stickers in a certain way around their tube they managed to get around 4300 CPM. So I tried too. I managed to arrange nine of my stickers in a similar arrangement as Mercator and I get around 4200 cpm also! It peaked at about 4218, but is mainly around 4100. I'm impressed for some cheap stickers! Excellent check sources. 😄 nzoomed, over on radmon.org, asked about a gamma spectrum, to try and identify the radioactive compound in these items. I only have a Radiacode 101, which whilst it

SI-19BG (M) | SI19BGM | СИ19БГМ - Tiny end-window Geiger Muller Tube I received this today after waiting for it to arrive for a couple of weeks. Purchased from Ukraine (via eBay). Not only is it tiny, it is the most expensive GM tube I have bought yet per gram of weight! And it appears to work okay. Sensitive to Gamma and Beta. This tube really is remarkably small. The end window must be no larger than 6mm diameter and the whole thing is only 20mm in length. It's not sensitive and for the couple of minutes I had it on test, the background was about 4cpm and it went nuts with Am-241 being held

For all of the posts in the Negative Ion Energy Ju-Ju series, click here. Latest Round Of Negative Ion Scalar Energy Ju-Ju - Moar stickers! If you haven't read my previous posts on these kinds of Ju-Ju items you can do here, here, here and here. This will probably be the last round of Negative Ion Scalar Energy Ju-Ju things from China, unless I find more unique Ju-Ju stuff. More stickers this time, some similar to what I have already shown. Most of these are pretty boring and not very active, except for one lot of stickers. I think I have practically bought every type of this nonsense so far.

*** Please note: Working with lithium batteries can potentially be hazardous. Damaging the battery can potentially cause fire or explosion. Learn and understand the risks before performing such a repair. *** I had to replace the battery in my Radiacode 101 as it was becoming potentially dangerous. I noticed the main button on the Radiacode wasn't pressing in properly and was sticking at times, so I popped the unit open and found the battery had expanded and was putting pressure on the circuit board, and thus making the button tight. The battery hadn't expanded like other LiPo's I have had,

For all of the posts in the Negative Ion Energy Ju-Ju series, click here. This is the latest update with more Thorium negative ion scalar energy anti-radiation radioactive Ju-Ju for shits and giggles. 😄 Some laughs and scary thoughts pursue! 😯 Somewhat of a sticker bonanza this time, along with some quantum Ju-Ju wearables. We have round stickers and rectangle ones. Different colours and finishes, and all radiating Thorium Ju-Ju goodness! This will probably be my last post on Ju-Ju radioactive stuff as I think I have exhausted the types that are available, without paying too much. There are