Search found 22 matches

by Alain
19 Jul 2018, 00:19
Forum: Spectrum
Topic: Fukushima soil
Replies: 9
Views: 2637

Re: Fukushima soil

Wow, nice spectra Svilen! Can you display the spectra also with logarithmic scale (y), if this is possible in PRA? For me it seems that first peak is 32 keV from Cs-137, the second one is probably Pb X, then backscatter and then three marked peaks. But there may be some other peaks between 796 and 1...
by Alain
09 Jul 2018, 09:28
Forum: Spectrum
Topic: In-situ CdZnTe Spectra from Belarus
Replies: 3
Views: 2306

Re: In-situ CdZnTe Spectra from Belarus

Hi Lars, extremely intersting :) From many travelers I've heard that in Belarus are extreme tight laws and rules and you certainly don't dare to smuggle out even a gram of such soil. But it would be interesting to know, if you have any data about specific activity (Bq/kg) of specific surface activit...
by Alain
09 Jul 2018, 08:42
Forum: Spectrum
Topic: Another Fukushima soil sample (with coincidences)
Replies: 5
Views: 2013

Re: Another Fukushima soil sample (with coincidences)

Hi Michael,

Unfortunately I cannot see pictures anymore. Is it possible to re-post them or maybe send them via PM?

Thanks,
Alain
by Alain
09 Jul 2018, 07:37
Forum: Spectrum
Topic: Thermal water, Bad Gastein
Replies: 3
Views: 1650

Re: Thermal water, Bad Gastein

Very interesting an very nice, clear spectrum (for a school book:). A friend of mine from Germany promised me to supply me a similar water from Gemany (Erzgebirge region, Schlema-Oberode, where in the DDR times there were one of the world bigest uranium mines, now they are finishing remediation of o...
by Alain
09 Jul 2018, 06:23
Forum: Detectors
Topic: some more video's and pictures plastic scintillator
Replies: 5
Views: 3258

Re: some more video's and pictures plastic scintillator

I remember one US research article (maybe from the 50' or 60'), where it was mentioned that tritium detectors are made from plastic scintillator turnings and shavings in conjunction with PMT. Shavings were filled into tube with glass window and gas conections and plastic was reacting on beta-radiati...
by Alain
09 Jul 2018, 02:34
Forum: Shielding
Topic: Incorrect shielding
Replies: 3
Views: 2882

Re: Incorrect shielding

On the first view it looks that this tungsten is realy badly contaminated with Th-232, maybe during production, maybe during some experiment... But when some metal part coming from high-energy devices, you may always consider the posibility that it is being activated. Betatron is a kind of particle ...
by Alain
09 Jul 2018, 02:12
Forum: Spectrum
Topic: Luuk's experiments
Replies: 4
Views: 2120

Re: Luuk's experiments

Hi,

I don't see these pdfs any more, unfortunately. Were they moved somewhere?
by Alain
09 Jul 2018, 01:24
Forum: Shielding
Topic: Old lead
Replies: 23
Views: 8301

Re: Old lead

Excellent work:) Good to know your experience and good practice in lead machining for any future work of forum members (including me;)
by Alain
09 Jul 2018, 00:09
Forum: Spectrum
Topic: Para nut , Brazil nut
Replies: 3
Views: 1916

Re: Para nut , Brazil nut

Hi Peter, maybe this topic is not alive any more, but I will reply anyway, maybe someone in the future will reading it and it would help him. I've made some measurements of Brazilian nuts also a few years ago. According to literature, these nuts should have increased radium concentration because of ...
by Alain
08 Jul 2018, 22:17
Forum: Shielding
Topic: Old lead
Replies: 23
Views: 8301

Re: Old lead

Nice finish of rings:) How did you machined them in a lathe, regarding softness of lead? Three or four-teeth chuck?