Search found 74 matches

by pilgrim
31 Jan 2019, 06:05
Forum: General discussion
Topic: Question about check sources
Replies: 18
Views: 4411

Re: Question about check sources

You can find Thorium Nitrate in some old Gas Mantles, but I suggest you not to buy it because these Mantles have a tendency to crumble, and dust could be ingested or inhaled and it would be very dangerous : Th232 is an alpha emitter! Moreover Rn220 is a Th232's daughter, it's not dagerous as Rn222 b...
by pilgrim
31 Jan 2019, 04:35
Forum: Software
Topic: Starting with theremino -Newbie Question
Replies: 3
Views: 1838

Re: Starting with theremino -Newbie Question

As Luuk explained here https://www.gammaspectacular.com/phpBB3 ... f=14&t=475, NaI(Tl) loses linearity under 100KeV, so if you calibrate under this energy peaks at at higher energies will be "out from their places".
by pilgrim
31 Jan 2019, 04:30
Forum: Software
Topic: Theremino MCA or Beqmoni ?
Replies: 12
Views: 1624

Re: Theremino MCA or Beqmoni ?

I agree with you about Theremino's advantages.
IMHO the main lack is the impossibility to calibrate the spectrum with more than just one energy, besides it needs a "smooth" peak to give you a quite real FWHM.

I've never used Beqmoni but i'd like to start to use these days.
by pilgrim
19 Jan 2019, 21:27
Forum: Spectrum
Topic: Monazite
Replies: 1
Views: 413

Re: Monazite

Good spectrum and excellent linearity.
That piece of Monazite it very beautiful.
by pilgrim
03 Jan 2019, 04:02
Forum: Detector drivers
Topic: GS-USB-PRO Review – Professional quality in every way!
Replies: 6
Views: 1539

Re: GS-USB-PRO Review – Professional quality in every way!

Hi Steve, good work and nice spectrum! I've always used Theremino MCA with BaseLine Test activated; I've never used the new GS-USB, but I think it could be better to activate it, or at least you can try and see what happens. I don't know the voltage you used, but you can try to lower it and increase...
by pilgrim
05 Dec 2018, 04:21
Forum: Shielding
Topic: Old lead
Replies: 23
Views: 8091

Re: Old lead

Hi Steve, I don't think 5% antimony could be an issue for shielding, but in addition to that you should also consider the density of the lead shot, the "fill factor". I think that a rolled sheet lead is a more compact solution, to have best shielding with the same space. I would strongly discourage ...
by pilgrim
26 Nov 2018, 02:26
Forum: Introductions
Topic: hello from NL
Replies: 2
Views: 684

Re: hello from NL

Hi Johan, welcome to the forum!
by pilgrim
17 Nov 2018, 07:20
Forum: Spectrum
Topic: Uranium glass
Replies: 1
Views: 844

Re: Uranium glass

Hi Peter,
this
UGlass-2.jpg
was my attempt with Uranium Glass, I thought that peak was due to Th231 or an escape peak, but Max Gaspa suggested me it was simply XRF.
by pilgrim
10 Nov 2018, 17:14
Forum: Introductions
Topic: Hello from South Australia!
Replies: 1
Views: 683

Re: Hello from South Australia!

Hi Lachlan, welcome to the forum!
by pilgrim
26 Oct 2018, 14:11
Forum: Introductions
Topic: Hello from Estonia!
Replies: 2
Views: 943

Re: Hello from Estonia!

Hi Eero, welcome to the forum!