Search found 74 matches

by pilgrim
30 Jun 2019, 19:03
Forum: Spectrum
Topic: Smoke Alarm - Americium 241
Replies: 6
Views: 224

Re: Smoke Alarm - Americium 241

I don't know but I think it is due to the detector efficiency at low energies...
In this case the advanced filter works as a zoom, to make PRA showing energies from 0 to 200 keV
by pilgrim
30 Jun 2019, 15:32
Forum: Spectrum
Topic: Smoke Alarm - Americium 241
Replies: 6
Views: 224

Re: Smoke Alarm - Americium 241

Hi Massimo, good work as always.
If it helps, this is my spectra recorded with the same source using a Victoreen LEG with a 1,5 x 0,5" NaI(Tl) crystal.
c-Am241-Victoreen-10000s.jpg
The peaks are 13.9, 17.7, 23.5 (sum peak of 20.8 e 26.4) and 59.6 keV
by pilgrim
22 Jun 2019, 05:33
Forum: Software
Topic: Dealing with temperature drift in PRA
Replies: 6
Views: 247

Re: Dealing with temperature drift in PRA

Conor Whyte wrote:
22 Jun 2019, 04:57
another thing I will need to do is to create a Pb castle with copper shielding to cut down the xrays.
This is very important, makes the difference!

Concerning PRA, if you simply click on SETTING -> SAVE SETTINGS, you'll find your current settings as default next time you run PRA.
by pilgrim
22 Jun 2019, 03:31
Forum: Software
Topic: Dealing with temperature drift in PRA
Replies: 6
Views: 247

Re: Dealing with temperature drift in PRA

For the point 1 if I click on SETTING -> SAVE SETTINGS AS, PRA saves the calibration. For the point 2 the only solution I thought is to take spectra in the basement, where the temperature is more constant comparing with the rest of the house. Moreover the background radiation is lower, thanks to the...
by pilgrim
12 Jun 2019, 03:00
Forum: Spectrum
Topic: Torbernite (Natural Uranium)
Replies: 4
Views: 297

Re: Torbernite (Natural Uranium)

Great post and very beautiful sample of Torbernite : did you try to light It with a UV light?
by pilgrim
10 Jun 2019, 01:32
Forum: Spectrum
Topic: Fiestaware (Depleted Uranium)
Replies: 3
Views: 259

Re: Fiestaware (Depleted Uranium)

I'm sorry but I din't checked that part of energies, because I didn't know about the Protactinium :-(
I could try again, maybe with the Uranium glass together the piece of Fiestaware, to have greater activity...
by pilgrim
08 Jun 2019, 00:52
Forum: Spectrum
Topic: Fiestaware (Depleted Uranium)
Replies: 3
Views: 259

Re: Fiestaware (Depleted Uranium)

This is my spectrum recorded from a little piece of Fiestaware, about 12-14g.
Fiestaware 14g, 2q, GS1100-PRO+P14, 930V 19,5h.JPG
by pilgrim
06 Jun 2019, 13:40
Forum: Spectrum
Topic: Tuff (Volcanic Rock)
Replies: 4
Views: 295

Re: Tuff (Volcanic Rock)

Honestly I don't remember, I only remember I recorded the spectrum outside the Lead shield because of the dimensions of the block.
by pilgrim
04 Jun 2019, 04:04
Forum: Spectrum
Topic: Tuff (Volcanic Rock)
Replies: 4
Views: 295

Re: Tuff (Volcanic Rock)

As usual, excellent work Massimo!
This, https://ibb.co/cYgpLm, is an old attempt I made with a single block.
by pilgrim
30 May 2019, 03:03
Forum: Spectrum
Topic: Fukushima Soil Sample "Reloaded" with both Cs134 Peaks
Replies: 9
Views: 545

Re: Fukushima Soil Sample "Reloaded" with both Cs134 Peaks

Hi Massimo, I think you're right but I'm not sure what you mean about the ratio.
You have a PM :-) !