Search found 208 matches

by Go-Figure
19 Jun 2020, 18:47
Forum: Detectors
Topic: Mirion PDS 100G, Spectrometric Personal Radiation Detector
Replies: 112
Views: 33944

Re: Mirion PDS 100G, Spectrometric Personal Radiation Detector

Hi All, Finally got things up and running, I've actually had the PDS100G since 2017, it must have been one of the first of the surplus sold on ebay? Below is a short (138 second) acquisition spectra of Am-241 - the only source I currently have to hand. https://i.imgur.com/I1xGpbu.png The peak is re...
by Go-Figure
15 Jun 2020, 00:40
Forum: Spectrum
Topic: Uranium Glass - Natural or Depleted Uranium?
Replies: 5
Views: 1564

Re: Uranium Glass - Natural or Depleted Uranium?

Massimo, You've inspired me to check the one piece of Uranium Glass I own. Always good to inspire somebody! I agree it's NU, I put it in the spectrum description as well, albeit I confess I had a few minutes of doubt. Yours is definitely DU. You know, I think I am probably the worst anti smoke pers...
by Go-Figure
08 Jun 2020, 02:50
Forum: Spectrum
Topic: Uranium Glass - Natural or Depleted Uranium?
Replies: 5
Views: 1564

Re: Uranium Glass - Natural or Depleted Uranium?

hello Massimo, a good job and a good result. You have to look for a new uranium glass. I bought a small cube and saw that the peak at U235 is then much smaller than that of old objects. Peter Hi Peter, Yeah, I need post WW2 pieces, but maybe I already have some among my samples, I just have to test...
by Go-Figure
07 Jun 2020, 22:24
Forum: Spectrum
Topic: Uranium Glass - Natural or Depleted Uranium?
Replies: 5
Views: 1564

Uranium Glass - Natural or Depleted Uranium?

Hello there, Today’s sample is a Uranium Glass ashtray. Uranium has been used as a colorant for a long time, with glass in particular this use goes back to the 19th century. That gave the glass a yellow, yellow-green appearance. Uranium glass is a general term which refers to several different types...
by Go-Figure
03 Jun 2020, 01:50
Forum: Spectrum
Topic: Uranocircite from Andalusia, Spain. With Shielding This Time
Replies: 2
Views: 1018

Uranocircite from Andalusia, Spain. With Shielding This Time

Hello there, In the past few days a gave a “better look” to a sample I tested back in September when I still had no shield whatsoever, it’s Uranocircite from Andalusia, Spain. You can read about that first test here https://www.gammaspectacular.com/phpBB3/viewtopic.php?f=5&t=633 The sample is very w...
by Go-Figure
28 May 2020, 17:32
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 Sparky, I just bought some more pewter which will allow me to double its thickness in my graded shield, so my next attempt will be with about 9 mm of pewter instead of 4-5 mm, that should further reduce fluorescence and it'll be interesting to compare results between spectra recorded with the two...
by Go-Figure
25 May 2020, 19:53
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

You are the king of the long measurements (and patience), Massimo! Maybe you can this way determine the optimal test period for these samples in your conditions, a good balance between time and result quality ;) One thing I learned, initially my focus was mainly in the accumulation time with the sa...
by Go-Figure
24 May 2020, 20:05
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

A promise is a promise....this is the result of my latest Trinitite measurement. The sample is the same “type 5” about which I already posted two different spectra, so this is the third one. This time it’s a 28 days measurement: 7 days of shielded background. 14 days with the sample inside the shiel...
by Go-Figure
24 May 2020, 19:51
Forum: Spectrum
Topic: A Tale of Triple Trinitite
Replies: 10
Views: 2813

Re: A Tale of Triple Trinitite

Questions are great! I have a thread about my shield upgrade project, this post shows my current setup: https://www.gammaspectacular.com/phpBB3/viewtopic.php?f=10&t=805#p3777 Normal unshielded background is 125 cps with my detector. My early shield (used for JC-TR-01) got that down to about 25 cps....
by Go-Figure
24 May 2020, 19:03
Forum: Spectrum
Topic: Autunite from Nevada
Replies: 6
Views: 1929

Re: Autunite from Nevada

Nice study and interesting to know, Massimo. I also thought the XRF contribution is greater. The 5 mm of pewter added to my shielding really do a good job in limiting the incidence of XRF and I am in the process to add some more. I think most of the increase on the low end is back-scatter noise, in...