Search found 214 matches

by Go-Figure
11 Jan 2021, 01:14
Forum: Spectrum
Topic: Trinitite Small Sample - Though he be but little, he is fierce!
Replies: 5
Views: 298

Re: Trinitite Small Sample - Though he be but little, he is fierce!

That also depends on the Geiger counter itself, the Ranger is quite sensitive and also has a quite large pancake probe which can detect alphas. Different geigers would give different count rates testing the same sample or the background. With this particular geiger I've never got less than 900 CPM ...
by Go-Figure
04 Jan 2021, 07:43
Forum: Spectrum
Topic: Trinitite Small Sample - Though he be but little, he is fierce!
Replies: 5
Views: 298

Re: Trinitite Small Sample - Though he be but little, he is fierce!

I had always thought about Trinitite as being associated with the first atom bomb test in New Mexico in 1945. I am pretty certain that the specimens that I've measured all came from that location. But there are other locations where Trinitite has been produced. I am uploading a pdf document that br...
by Go-Figure
03 Jan 2021, 00:20
Forum: Spectrum
Topic: Trinitite Small Sample - Though he be but little, he is fierce!
Replies: 5
Views: 298

Trinitite Small Sample - Though he be but little, he is fierce!

Hello there. Last month something unexpected happened to me. I so some science popularization on social media and on a few websites which sometimes share the contents. Just some science in the basement for fun. A guy got in touch with me saying he had just bought a Trinitite sample and he would like...
by Go-Figure
06 Dec 2020, 00:48
Forum: Spectrum
Topic: Chernobyl Contamination in Italian Alps Soil Extended – 30 Day Gamma Spectrum
Replies: 1
Views: 490

Chernobyl Contamination in Italian Alps Soil Extended – 30 Day Gamma Spectrum

Hello there, First of all, is the thread title correct, or should it be “Piemonte Alps’s Soil”? A few days ago I finished my longest measurement so far. Since Ciro (Cicastol) very kindly shared this Italian alps soil sample with me I already tested it twice. The first time it was a 36 hour run: a 12...
by Go-Figure
06 Dec 2020, 00:32
Forum: Spectrum
Topic: Trinitite
Replies: 2
Views: 395

Re: Trinitite

Nice spectrum!
Anyway, as far as Ba133 is concerned, the most prominent peaks should be at 81 keV and 356 keV. It sounds a bit strange to me that you can get the Ba133 peak at 160 keV and not the other two.
http://nucleardata.nuclear.lu.se/toi/nu ... iZA=560133

Massimo
by Go-Figure
06 Dec 2020, 00:26
Forum: Spectrum
Topic: Calibrate the energy
Replies: 4
Views: 451

Re: Calibrate the energy

In case you find some let us know, anyway once you have the calibration right up to 2.6 MeV I don't know how much it can go off at 3.2 MeV.
Anyway, in my case I had never tested samples with peaks at such high energies so I would have never known.

Massimo
by Go-Figure
02 Nov 2020, 01:48
Forum: Spectrum
Topic: Potassium Chloride Salt - Radioactive Salt
Replies: 8
Views: 1085

Re: Potassium Chloride Salt - Radioactive Salt

Hello Massimo, Yes, "dietary salt" gives a nice K40 peak. Keep in mind that it's not 100% KCl but usually somewhere in between 1/2 and 2/3, the rest is sodium chloride, magnesium carbonates and other stuff. Thus, potassium content is from 25% to 35% by weight. Pure laboratory KCl in contrast would ...
by Go-Figure
19 Oct 2020, 01:51
Forum: Spectrum
Topic: Potassium Chloride Salt - Radioactive Salt
Replies: 8
Views: 1085

Potassium Chloride Salt - Radioactive Salt

Hello Folks, It’s been a while from my last post. I’ve been busy with work, but in the last few weeks I still managed to put together a measurement. Some time ago I found myself in a conversation about food, it felt like one of those occasions where people end up taking pictures of what they are eat...
by Go-Figure
19 Oct 2020, 01:44
Forum: Spectrum
Topic: A closer look at Trinitite below 40 keV
Replies: 1
Views: 528

Re: A closer look at Trinitite below 40 keV

One day I will test again my Type-5 Trintite, your result is very interesting and I will give a good a read to the paper, thanks for that!

Massimo
by Go-Figure
19 Oct 2020, 01:41
Forum: Spectrum
Topic: Curit from the Congo
Replies: 3
Views: 687

Re: Curit from the Congo

Nice sample...how many counts you got from it compared with background?

Massimo