Search found 165 matches
- 05 Mar 2022, 01:02
- Forum: Detectors
- Topic: 2*pi vs 4*pi
- Replies: 7
- Views: 1756
Re: 2*pi vs 4*pi
The same formula can also be found in Fünfer-Neunert "Counting tubes and scintillation counters" 1945.
- 23 Feb 2022, 08:46
- Forum: Spectrum
- Topic: PMT give light !
- Replies: 6
- Views: 1400
Re: PMT give light !
If you solder something directly to the pins of a PMT, microcracks can appear in the glass and air can slowly penetrate. Never solder directly to a PMT.
- 08 Nov 2021, 01:08
- Forum: Spectrum
- Topic: Clean ¹³⁸La
- Replies: 1
- Views: 672
Re: Clean ¹³⁸La
I also measured La138 a few months ago. It was 100 grams of La oxide. I could only see the 2 lines of La138.
Peter
- 01 Aug 2021, 18:41
- Forum: Spectrum
- Topic: XRF on a gamma spectrometer!
- Replies: 13
- Views: 2845
Re: XRF on a gamma spectrometer!
Hello,
for a comparison I have my Am241 spectrum with a 2 "NaI crystal and a EMI PMT.
Peter
for a comparison I have my Am241 spectrum with a 2 "NaI crystal and a EMI PMT.
Peter
- 30 Nov 2020, 23:33
- Forum: Spectrum
- Topic: Calibrate the energy
- Replies: 4
- Views: 2575
Re: Calibrate the energy
Thank you for the information. now i have also seen the law of decay in a large list.
Peter
- 30 Nov 2020, 00:43
- Forum: Spectrum
- Topic: Calibrate the energy
- Replies: 4
- Views: 2575
Calibrate the energy
Hello,
I like to use a thorium sample to calibrate the energy in my program. Unfortunately, this only works up to 2614 keV. My question: is there still an isotope that can be used in even higher energy ranges?
regards
Peter
I like to use a thorium sample to calibrate the energy in my program. Unfortunately, this only works up to 2614 keV. My question: is there still an isotope that can be used in even higher energy ranges?
regards
Peter
- 05 Nov 2020, 03:45
- Forum: Spectrum
- Topic: Uranium-radium decay
- Replies: 3
- Views: 2335
Re: Uranium-radium decay
hello Mike,
my first spectra of soil samples were in Sept. 25, 2019. The title: soil sample
Peter
my first spectra of soil samples were in Sept. 25, 2019. The title: soil sample
Peter
- 04 Nov 2020, 02:28
- Forum: Spectrum
- Topic: Uranium-radium decay
- Replies: 3
- Views: 2335
Uranium-radium decay
I am looking for help and explanation! During some measurements of the spectrum of uranium glass, uranium compounds and the soil sample from Gottow, I made an observation that I couldn't explain. The line at 63.3 keV for Th234 varies greatly. Both in the soil sample and in a uranium glass from Schot...
- 02 Nov 2020, 04:23
- Forum: Spectrum
- Topic: Potassium Chloride Salt - Radioactive Salt
- Replies: 13
- Views: 4404
Re: Potassium Chloride Salt - Radioactive Salt
I use a very pure salt from a pharmacy. 99.9% according to analysis. So I am sure that I really only have potassium in the sample. The spectrum shown was created with this salt. Background was 16.7 CPS, with KCl it was 32.7 CPS.
Peter
- 19 Oct 2020, 23:17
- Forum: Spectrum
- Topic: Curit from the Congo
- Replies: 3
- Views: 2500
Re: Curit from the Congo
Hello Massimo, of course I saved the values. The total measurement time was 4.37 hours. During this time it was 395.9 CPS in total. The background rate in my system is only 16.5 CPS. The net rate of the probe is 379.4 CPS. From a measurement with a Geiger counter and taking into account the distance...