Fake Trinitite Spectrum

Share your spectra and discuss their features here
User avatar
Geoff
Posts: 67
Joined: Fri May 01, 2015 12:21 pm
Location: Alaska
Contact:

Fake Trinitite Spectrum

Postby Geoff » Thu May 21, 2015 2:52 pm

Well, I got burned on this one. I bought a "certified authentic" piece of Trinitite a few months ago and just tested it yesterday. Attached is the 24 hour spectrum with background subtracted.

Image
Geoff Van Horn

Anchorage and Deadhorse Alaska

User avatar
Steve Dubyk
Posts: 30
Joined: Sat May 02, 2015 6:25 am
Contact:

Re: Fake Trinitite Spectrum

Postby Steve Dubyk » Thu May 21, 2015 11:00 pm

Ouch, it looks like typical U ore. Trinitite has dominant peaks from Cs-137 and Am-241, with lots of little peaks from Eu-152, -154, and other nuclides. I can post a couple of papers in the library that show the spectrum from trinitite.

Steve Dubyk

User avatar
brehwens
Posts: 79
Joined: Mon Apr 27, 2015 3:49 am
Contact:

Re: Fake Trinitite Spectrum

Postby brehwens » Fri May 22, 2015 5:59 am

Hi Geoff,

That sucks... I bought my trinitite sample via a contact from the Yahoo forum, so it was kind of failsafe. I could also verify that it was indeed trinitite.
Still, the 3x3" probe I used picks up lots from the background as well and the trinitie sample was weak, so a smaller probe and more lead could possibly be more informative. I hope to be able to test this in the time to come.
Attachments
814--361441581321396640478--Trinitite 63h-1200x800.jpg
trinitite, 3x3" NaI
814--361441581321396640478--Trinitite 63h-1200x800.jpg (116.61 KiB) Viewed 1691 times
Karl Brehwens
Eskilstuna, Sweden.

Setup: 5 cm lead castle, 2mm copper lining. Gamma Spectacular Pro 2002, Sound Blaster Live! 5.1,
Primary detector: Scionix refurbished 2x2" NaI(Tl) well detector, 7.5% @ 662 keV

User avatar
Steve Dubyk
Posts: 30
Joined: Sat May 02, 2015 6:25 am
Contact:

Re: Fake Trinitite Spectrum

Postby Steve Dubyk » Fri May 22, 2015 8:56 am

I've attached a file with a few more examples of the trinitite spectrum, using different probes. I do like using trinitite for testing, especially to see the 26 and 59 keV from cesium and americium.

Steve
Attachments
Trinitite Spectra Examples.pdf
(247.6 KiB) Downloaded 67 times

User avatar
Geoff
Posts: 67
Joined: Fri May 01, 2015 12:21 pm
Location: Alaska
Contact:

Re: Fake Trinitite Spectrum

Postby Geoff » Fri May 22, 2015 3:51 pm

I used my 4.5x.75 inch NaI detector and ran it for 24 hours. Then I ran the background for 24 hours and subtracted that to get my spectrum.

Here is all the data

Image
Geoff Van Horn

Anchorage and Deadhorse Alaska


Return to “Spectrum”

Who is online

Users browsing this forum: Peter (vital1) and 0 guests