0.085 mR/hr on my calibrated Ludlum model 18 including background.
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Radioactive minerals on mindat you say? My photo gallery can be found at https://www.mindat.org/gallery-21211.html As for radian barite, minerals tend to be pretty old. I have a huge sample from the Czech Republic but it’s not very strong. Most of the radium has already decayed to lead making it mor...
- 04 Aug 2019, 00:47
- Forum: Spectrum
- Topic: Will the real K-40 please stand up (please stand up, please stand up)
- Replies: 12
- Views: 335
That bump should be there. It’s likely 125 keV. You can see there are more peaks to a 241Am spectrum hidden by the 59 keV in my discussion on energy attenuation:
- 27 Nov 2018, 13:31
- Forum: Resources
- Topic: New links to INL's gamma ray catalogue
- Replies: 1
- Views: 984
Hi all, long time since I've been on. I'm still settling in in Wisconsin, not much time for the hobby yet. I finally got a chance to set up my spectrometer and mess around with PRA 20. I really like the background subtraction! Anyway, while calibrating I found that the old links to Idaho National La...
It's a spectacular drive, but not the longest I've done. When I moved up in 2005 I drove from North Carolina to Alaska. About another 18 hours in the car from there. I've got some awesome non-radiation related pictures from the trip. I'll make a public photo album on Facebook later and share it here.
The dismal job market in Alaska has finally chased me away. I drove back to Wisconsin last week and am getting set up in my Mom's basement while I search for a new place to live. I'm looking at buying a quarry on the Stettin pluton and getting back into prospecting rare earth minerals again. In the ...
- 15 Jun 2018, 08:24
- Forum: Spectrum
- Topic: 90Sr/Y beta continuum from 4 year old source
- Replies: 0
- Views: 1505
I had an opportunity to buy a four year old .1 uCi 90Sr source (90% of the original isotope still exists) for half the cost of a new one. I didn't NEED it, but seeing as I didn't have a pure beta emitter I figured I'd buy it. Here is a ten hour spectrum I collected after it arrived. I'm experimentin...