Search found 208 matches

by Go-Figure
24 May 2020, 18:49
Forum: Spectrum
Topic: A Tale of Triple Trinitite
Replies: 10
Views: 2813

Re: A Tale of Triple Trinitite

Trinitite is always great to test, I found so much variety from one sample to the othee that I never really know what to expect before starting with a new one. I'd like to ask a few questions to understand the results better: Can you share some detail about your shielding setup? How many CPS your sa...
by Go-Figure
24 May 2020, 18:36
Forum: Spectrum
Topic: Alphaspec of Ra226
Replies: 7
Views: 1999

Re: Alphaspec of Ra226

This is really something Peter,
Alpha spectroscopy is something that's been in the back of my mind for a while now, thank you for this post.

Massimo
by Go-Figure
17 May 2020, 20:37
Forum: Spectrum
Topic: Autunite from Nevada
Replies: 6
Views: 1929

Re: Autunite from Nevada

Hello there, This is the second post about my “Autunite from Nevada” test. Why doing another post about it? Because I wanted to do a comparison of a shielded and an unshielded measurement of the same sample, both with background subtraction. When I started doing gamma spectroscopy it took me about s...
by Go-Figure
17 May 2020, 20:04
Forum: Spectrum
Topic: My first Mystery Source (Ra226)
Replies: 12
Views: 3776

Re: My first Mystery Source (Ra226)

Hi Mike. A mistery source is always a lot of fun! Looking at the spectrum, Ra226 is definitely there. Problem is Ra226 gamma spectrum only differs from U238 for the two Th234 at 63 keV and 92 keV and it's very easy to miss them. I tested a few uranium ores where those two peaks were completely burie...
by Go-Figure
15 May 2020, 06:56
Forum: Spectrum
Topic: Autunite from Nevada
Replies: 6
Views: 1929

Re: Autunite from Nevada

Hi Massimo, Thank you for sharing this measurement. You may have also Bi-214 at 935keV visible, but you said you want to leave the other bumps unlabeled, so you may have a reason. Is the unlabeled bump before Bi-214 at 609keV from Compton interactions? Greetings, Yeah, Bi214 at 934.06 keV is defini...
by Go-Figure
11 May 2020, 05:25
Forum: Spectrum
Topic: Autunite from Nevada
Replies: 6
Views: 1929

Autunite from Nevada

Hello there! It’s been a while since my last post, but I used the lockdown here in Italy, which ended this past week (albeit the emergency is far from over), to record a very long Trinitite spectrum which I am going to write about in the coming days, there’s still one thing I need to check before po...
by Go-Figure
11 May 2020, 05:18
Forum: Spectrum
Topic: Protactinium
Replies: 5
Views: 2382

Re: Protactinium

Peter, In PRA there is a function called "Sum Qty" it multiplies counts by bin number and enhances the higher energy peaks while reducing the low energy peaks. Very handy for doing just what you did above. Steven I quote Steven, the "energy per bin" function in PRA is pure gold to better see high e...
by Go-Figure
11 May 2020, 05:15
Forum: Spectrum
Topic: uranium glass spectrum
Replies: 2
Views: 1661

Re: uranium glass spectrum

Nice one! Judging from the U235 peaks I would say it's depleted uranium which is expected. I will do an uranium glass spectrum soon, I have a piece weighing 1 Kg (from a flea market in my case too), so it won't be hard to get some good activity. I personally don't trust too much the doserate read fr...
by Go-Figure
01 Apr 2020, 21:48
Forum: Spectrum
Topic: Trinitite – The Quest for Europium and More: A 17 Day Gamma Spectrum
Replies: 22
Views: 7177

Re: Trinitite – The Quest for Europium and More: A 17 Day Gamma Spectrum

hello Massimo, I have now also tried to find the peak at 1408 keV. I'm not sure if it's the Eu 152 line. Unfortunately only a measuring time of 11 hours. What do you think about the measurement ? 2020_03_30-Trinitit-C.jpg Peter Hi Peter, After testing no less than seven different Trinitite samples ...
by Go-Figure
30 Mar 2020, 09:13
Forum: Spectrum
Topic: Trinitite – The Quest for Europium and More: A 17 Day Gamma Spectrum
Replies: 22
Views: 7177

Re: Trinitite – The Quest for Europium and More: A 17 Day Gamma Spectrum

Hi again, A new spectrum from the lockdown. Not really a new one, it's my second attempt with the type 5 trinitite sample. Why did I do it again? Well, first of all the spectrum I got from this sample was so much richer than anything I got before from my mostly miserable attempts with other trinitit...