/r/Radiation
Welcome! Please follow our rules:
1. Ionizing radiation discussion only
This subreddit is for discussion of ionizing radiation such as alpha, beta, gamma, and x-ray. Please do not post about RF, 5G, wi-fi, or common electronic items causing cancer or health issues.
2. Don't be a jerk
Please treat each other respectfully.
3. Do not ask for medical advice
Reddit is not a place for medical advice. Please talk to your doctor or healthcare team about your medical decisions.
4. No promotional activity
Please don't use our community for advertising or promotion. Unsolicited linking of products, services, social media (including youtube channels) etc. is discouraged. In response to questions about products, it's fine to make recommendations - please include an explanation of your input and not simply a link or product name.
5. No fake content posted in bad faith
Any content that has been faked is subject to removal and the user subject to ban at the discretion of the mods. This includes, but is not limited to, photoshops, video editing (including special effects e.g. speckles/compression artefacts), claiming a source is something it is not (e.g. saying a 0.9 Am-241 source is 20 mCi of Co-60), claiming an object is radioactive when it is not, showing false readings that are faked with a hotter source, EMI, photo/video manipulation, or other method, etc.
Visit other related subreddits:
/r/Radiation
27,998 Subscribers
WW2 Demolition Timer worrisome
21:33 UTC
RadEye Prd recalibration share
I bought a used RadEye Prd on ebay a few weeks ago that was last calibrated in 2011.
I sent it to Occupational services (San Diego) to have it recalibrated out of curiosity to see if it was out of calibration. Personal information was erased with MS paint.
-Just wanted to share the findings. - I am just a hobbyist
21:23 UTC
Gamma reactions due to protons collisions
21:07 UTC
Software about ICX Interceptor
Hi folks this is my first post here. I got an Interceptor recently with no pc software. Without PC communication software, I think the interceptor can do very little. So if who have this software please send me a copy, very many thanks for your valuable help.
20:37 UTC
What is an Electron Volt?
I’ve seen some xrays being measured in Kev, but what is it exactly?
19:06 UTC
Need help for story; safe distance from source[question]
So the character is about 8m away from the source which is a diluted radioactive liquid. Lets call it Godzilla blood because that's basically what it is for the story. She is reading 34mSv from that point and only 30mSv a step behind. How would I calculate the source level radiation?
I am currently using Sieverts but if you have a better unit, please use that. I don't know much about radiation and have no idea how to use the online calculators. I am just using what I found online where 50mSv is considered safe.
17:27 UTC
Anyone know any good but cheap gieger counters for under $50?
15:21 UTC
Missing radioactive material
It's been found, apparently.
Se-75 is the isotope.
Kinda crazy to me that this stuff is so easily misplaced.
13:25 UTC
probability of some1 having/using an xray for personal use
I just want to know what is the chance sum1 could acquire any machine or device similar to an xray and use however they want.
13:07 UTC
Interesting find…
01:15 UTC
Radiacode Downhole Borehole Spectrum Part 2
Hi Everyone,
If you saw my last post, basically I lowered a dummy well logging tool down in a test well about 130 feet deep in the shales. The bottom of the tool had a 5 Ci neutron source on it. So my goal was/is to get a gamma spectrum caused by the activation/capture of neutrons. If you've never heard of it, it's called Neutron Activation Analysis.
The spectrum I collected was only 90 minutes or so. Certainly not enough time to get a good spectrum with the 102. However, it is running all night as I write this, so tomorrow I hope to have something worthwhile. The 90 minute spectrum shows the influence of the Am241 directly from the source in the lower energies. You can make out a couple of peaks and if you look close, there is one at 2200 Kev. That might be hydrogen capture. It looks like there could be other good peaks tomorrow.
If you want this spectrum, I uploaded it to wetransfer.com. You don't have to sign up for anything or even login. You just click the link and then it will take you where you can download the XML file. It is - https://we.tl/t-NBfa9ckgXY
So, I will give you a part 3 tomorrow sometime. Just remember that almost all the gamma you see in this is caused by the neutrons and their activation of elements in this shale. However, the hole does have some natural gamma in the form of Potassium for the most part but there are traces of U and T as well.
00:49 UTC
Tear down of a “smart” pancake probe; with the most commonly used alpha/beta/gamma thin mica window Geiger Muller tubes.
Hi all, this is a full tear down of a “pancake probe”, which is an industry standard for frisking, contamination detection, regulatory, mining, and general purpose alpha/beta/gamma detection. This specific probe is for the Thermo/Eberline E600, so you can see how they work. There’s also a brief description of how E600 “smart probes” work. I’m not trying to sell anything here, I simply have some broken probes and figured some folks might be interested.
The demonstration contains shows both intact and broken GM pancake tubes and shows just how incredibly thin and fragile mica window probes are. It also shows the slight difference in internal design of these tubes by different manufacturers.
This probe I’m tearing down uses the same tube as the Ludlum 44-9, Eberline HP-260, HP-210, Thermo HP-360, Bicron PGM, and many others. Many professional Geiger counters which detect alpha in addition to beta and gamma radiation use this type of probe. They are always covered with some sort of mesh screen to protect the sensitive tube.
The tubes are expensive; about $150 a piece, and I’ve popped about 10 of them over my many years as a tech. They make a distinctive loud popping noise when compromised, always followed by my intense and involuntary utterance of the F-bomb. A couple of those were busted in use, but the majority of ones I’ve popped have been due to mishandling while replacing one in someone else’s probe.
Enjoy!
00:31 UTC
Can someone recommend good and fun books on Radioactivity, Ionising Radiation, Radioactive minerals, Nuclear reactions ?
19:14 UTC
Military AN/VDR-2 and a Civil Defense CDV-718
Just sharing a few pictures of a project I had over a decade ago where I welded together two Army mounts and stacked a military AN/VDR-2 and a Civil defense CDV-718. I painted the mount in the Civil defense yellow. I had this on my desk for years, and then tucked it away. I recently got interested again after getting a Radiacode 103G and pulled this out of the closet. The AN/VDR-2 gives readings in μGy/hr and the CDV-718 reads in mR/hr. I love it all over again and just wanted to share in case anyone found it interesting.
01:19 UTC
Geiger Counters
Does anybody have any good Geiger counter recommendations that are accurate and don’t break the bank?
22:04 UTC
Please stop posting gmcmap "data"; it is not a reliable source.
gmcmap can and is easily manipulated by defective equipment and malicious users inputting false data. We have had a large number of these posts recently, especially since the drone events in NJ, and it's always the same thing; The data is bad. Do not trust it.
21:21 UTC
Question on Beta Influence on Survey Meters
Hi Everyone,
I have a question for the group. I have a calibrated Ludlum that uses a 44-6 probe. The 44-6 has a rotary beta shield to block any beta. It can also be used to measure just the beta itself but it has to be in CPM and you basically subtract the closed from the open. So in the pictures, I have a 4.5 uCi Cs-137 source taped to the side of a paperweight. I have it at the same height as the 44-6 probe and it is 1.5" away from the center of the detector. With the rotary beta shield closed, I get a reading of about 0.66 mR/hr. When I open the rotary beta shield the meter goes sky high. I have it pictured here just pegging out at my x1 selector. Now when I put the little calibrated GMC-800 up to it with the source raised to be where the tube is at and at the same distance as the Ludlum, I get a reading of 0.69 mR/hr. So based on this, why would you say the GMC-800 is not showing this major beta contribution? I have my own theory but want to see what you all have to say. Thanks!
19:32 UTC
Geiger Counter
What would be the best value Geiger Counter?
17:52 UTC