Gamma Spectrometry Forum

Thanks, Michael! I just replied. I'll keep researching. Got to build good lead shielding. I'll spend a lot more time this weekend.

You can turn your three 5 min surveys into one 15 min survey by calculating the number of counts (rate X 5 minutes) and summing the results. More counts means greater accuracy. In your first set of three 5 min surveys, you had 964 counts with the beans and 652 counts with background. Using these co...

I'm using PRA today to try check soy beans but it doesn't let me change the Interval Histogram value from 20.8 to 2.6. I hit Apply & it immediately reverts back to 20.8. I even loaded old setting that worked fine the last time, it also got stuck at 20.8. I restarted laptop, uninstall & manua...

iRad wrote: ↑

04 Apr 2022, 08:14

Chris - Please check out your "Private messages" from me and contact me at my email address. Thanks, Tom

Thanks, Tom. I just emailed you.

You can turn your three 5 min surveys into one 15 min survey by calculating the number of counts (rate X 5 minutes) and summing the results. More counts means greater accuracy. In your first set of three 5 min surveys, you had 964 counts with the beans and 652 counts with background. Using these co...

Is it possible that PMT & the rest may be the weakest link for most of the large crystal like yours? I understand RadiaCode 101, Atom Fast 8850 & RaysID are all using much smaller crystal (doped with Tl) with silicon PMT plus optimized pipelining & machine learning-type of processing to ...

Hi all, I have been making my own organic soy milk using this machine (can also make soup, etc) @ https://tinyurl.com/549ek2e5 I bought my first bag of organic soy beans recently. Today, I decided to take a look using the 2nd unit of GQ GMC-600 Plus. Here is what I got totally unexpected. This organ...

It may be interesting to check against Co-60 source @ https://youtu.be/MSxD964J8sY I understand RadiaCode 101 use cube sensor unlike Atom Fast 8850 giving it similar sensitivity from all directions (with smaller sensor, of course).

BTW, I have not created any custom lead shielding yet. I did use lead pig to place sample in the front of the 1.5" NaI probe (also to block anything coming my ways). I just clean everything today and use Atom Fast 8850 as dosimeter to make sure I don't get myself exposed to too much radiation &...

Steve, I re-calibrated using Cs-137 and attached all data for Cs-137, Po-210, Sr-90 & others. I'll subtract background next weekend. I think I might know what causes the wild mushroom to be radioactive. When I got it, I kept both Uranium ore (inside a tin can) right next to the plastic bottle of...