Search found 46 matches

by Svilen
26 Sep 2018, 07:16
Forum: Spectrum
Topic: Quantum Scalar Pendant Technology
Replies: 3
Views: 1698

Re: Quantum Scalar Pendant Technology

More than a year before I also bought one of these and tested it. I guess I never showed the result, I thought everybody has already seen it :)
Image


A bit off calibration, but clearly Thorium inside:
Image
by Svilen
26 Sep 2018, 06:55
Forum: Spectrum
Topic: Polonium spark plugs spectrum (no polonium left there of course)
Replies: 2
Views: 1266

Re: Polonium spark plugs spectrum (no polonium left there of course)

Not from this amount of Polonium, not after all this time and definitely not Radium as a result.
by Svilen
22 Jul 2018, 08:40
Forum: Spectrum
Topic: Polonium spark plugs spectrum (no polonium left there of course)
Replies: 2
Views: 1266

Polonium spark plugs spectrum (no polonium left there of course)

I got recently five Firestone Polonium spark plugs from the 50-ties, unused and with the original packing, nice for collecting. Since they were giving ~5 imp/s higher activity than the background in the castle (~15/s) I recorded the spectrum, even when no polonium-210 is expected inside after maybe ...
by Svilen
19 Jul 2018, 09:35
Forum: General discussion
Topic: IEEE Sydney 2018
Replies: 2
Views: 1219

Re: IEEE Sydney 2018

It seems Australia is too far away for most of us here...unfortunately. Do you visit events in Europe, Steven?
Where can I read about the "Pieter's 2.2 ┬Ás muon experiment" ?
by Svilen
19 Jul 2018, 09:08
Forum: Spectrum
Topic: Fukushima soil
Replies: 9
Views: 2556

Re: Fukushima soil

Thanks for all the replies. Nice spectra, Daniel and Ciro! Thank you for your analysis, Alain. I guess in all the software MCAs logarithmic scale is possible, including PRA. I checked it of course, but in this case it is not very different, except some trends in the higher energies, where it needs a...
by Svilen
17 Jul 2018, 05:44
Forum: Spectrum
Topic: Fukushima soil
Replies: 9
Views: 2556

Fukushima soil

I received today the soil sample from Luuk and here is the result. Just 2.5h measurement, great linearity of the detector in PRA - no tricks. Outstanding preparation from Luuk - thank you very much!

Image
by Svilen
15 Jul 2018, 06:03
Forum: Spectrum
Topic: Trinitite spectrum
Replies: 7
Views: 2078

Re: Trinitite spectrum

Hi Peter, Nice spectrum! Thanks. I have really, as Ciro mentioned above, a lot of background in the lower energy range. Thanks for your remarks, Ciro. Yes, more lead is always better of course, but I really didn't think to leave some more space around the detector the time I planned the shielding.. ...
by Svilen
13 Jul 2018, 17:25
Forum: Spectrum
Topic: Trinitite spectrum
Replies: 7
Views: 2078

Re: Trinitite spectrum

Hi Steven and Daniel, Thank you for your replies. I get roughly around 1-2Kev/degree shift even if the day is colder/warmer than the calibration day. Something like this happens definitely during the recording too. Yesterday I even wanted to ask how you maintain constant temperature? Maybe I can put...
by Svilen
13 Jul 2018, 04:07
Forum: Spectrum
Topic: Trinitite spectrum
Replies: 7
Views: 2078

Trinitite spectrum

This is what I got with my setup ( http://www.gammaspectacular.com/phpBB3/viewtopic.php?f=16&t=411 ) from a trinitite sample. 8h with PRA: https://i.imgur.com/aooOMUK.png and 6h with Theremino (equlizers only are used, but not on the sample, during callibration with Lu, Ra, Cs and K: https://i.imgur...
by Svilen
10 Jul 2018, 07:33
Forum: General discussion
Topic: My current setup
Replies: 7
Views: 2189

Re: My current setup

Thank you for your detailed reply Alain! Upside down would be tricky, but to compare the counts/spectra in vertical and horizontal position of the castle is easy and I can do it. This design is not the best of course, but was a compromise between complexity/price/mass and others. Actually, how signi...