Search found 93 matches
- 14 Aug 2019, 08:26
- Forum: Spectrum
- Topic: Radiation release near Severodvinsk
- Replies: 11
- Views: 6813
Re: Radiation release near Severodvinsk
That's where the isotope analysis would help. :)
- 14 Aug 2019, 05:41
- Forum: Spectrum
- Topic: Radiation release near Severodvinsk
- Replies: 11
- Views: 6813
Re: Radiation release near Severodvinsk
Essentially a small reactor used to generate heat and cause a gaseous or liquid propellant to expand and generate thrust.
- 13 Aug 2019, 21:46
- Forum: Spectrum
- Topic: Radiation release near Severodvinsk
- Replies: 11
- Views: 6813
Re: Radiation release near Severodvinsk
If it's technetium that would point towards a uranium-based device, i.e. a reactor, rather than a plutonium device i.e. a warhead.
- 13 Aug 2019, 11:42
- Forum: Spectrum
- Topic: Radiation release near Severodvinsk
- Replies: 11
- Views: 6813
Radiation release near Severodvinsk
I was wondering if there are fellow gamma spectroscopists in a geographical position to take any environmental readings of radiation supposedly released in the recent Russian military accident near Severodvinsk. Might be educational to see what isotopes are involved.
- 03 Aug 2019, 01:13
- Forum: Detectors
- Topic: WIP stilbene
- Replies: 1
- Views: 2363
- 03 Aug 2019, 00:59
- Forum: Detectors
- Topic: WIP stilbene
- Replies: 1
- Views: 2363
WIP stilbene
Inspired by the previous thread by Steven I have acquired a stilbene crystal and just got around to building a detector with it. Stilbene emission is mostly in violet/UV range with peak at 390nm. I have consequently built the detector with a UV-enhanced PMT. The crystal I have is20mm diameter by 30m...
- 30 Jul 2019, 23:20
- Forum: Spectrum
- Topic: Will the real K-40 please stand up (please stand up, please stand up)
- Replies: 12
- Views: 6696
Re: Will the real K-40 please stand up (please stand up, please stand up)
And indeed almost completely linear at 670V. I used Am-241 for the low end because the 88keV from Lu-176 was not clearly distinguishable. Even the Am-241 peak was unusual-looking, with a hump to the right side which I haven't seen before. The 26keV from Am-241 was not visible at all. In the graph I ...
- 30 Jul 2019, 08:09
- Forum: Spectrum
- Topic: Yet another Cs-137 spectrum from the Chachersk soil sample
- Replies: 3
- Views: 2599
Re: Yet another Cs-137 spectrum from the Chachersk soil sample
The next time I go home - and by that I don't mean the place where I live now but the place where I was born, 5000 miles away from here - I should take some sort of gamma spectroscopy setup with me, or at least a survey setup to try and get samples. Even though it's probably going to be difficult to...
- 30 Jul 2019, 06:52
- Forum: Spectrum
- Topic: Will the real K-40 please stand up (please stand up, please stand up)
- Replies: 12
- Views: 6696
Re: Will the real K-40 please stand up (please stand up, please stand up)
And even better at 700V (my default voltage for this setup). I had to increase the volume to 30% to keep the K-40 put. TBH the nonlinearity at the lower end is not unexpected. The Lu-176 peak at 88keV is much less defined than at higher voltages so there's an amount of uncertainty as to its exact lo...
- 30 Jul 2019, 05:06
- Forum: Spectrum
- Topic: Will the real K-40 please stand up (please stand up, please stand up)
- Replies: 12
- Views: 6696
Re: Will the real K-40 please stand up (please stand up, please stand up)
725V, better but still convex to some degree.