Search found 66 matches

by Svilen
17 Sep 2019, 06:51
Forum: Detectors
Topic: Mirion PDS 100G, Spectrometric Personal Radiation Detector
Replies: 51
Views: 961

Re: Mirion PDS 100G, Spectrometric Personal Radiation Detector

I misunderstood you, I thought you mean the threshold value, now clear. I tuned it a bit more and now I am satisfied by what I get. Yes, the 1764 keV peak could be used, but so far I was somehow lazy to press "continue" often enough for a really long measurement. I don't know why they didn't put an ...
by Svilen
17 Sep 2019, 06:04
Forum: Spectrum
Topic: Lutetium Spectrum
Replies: 5
Views: 118

Re: Lutetium Spectrum

Nice Lutetium sample, Matthew. When two (or more) gamma-rays are emitted during the same decay event of the nucleus (seemingly instantaneously), the so called coincidence, the detector sees both of the gamma-ray energies as one larger energy and a summation photo peak is shown at the combined energy...
by Svilen
15 Sep 2019, 17:52
Forum: Spectrum
Topic: Beach sand, Vromos bay (Bulgaria)
Replies: 5
Views: 96

Re: Beach sand, Vromos bay (Bulgaria)

Hi Milene, nice report. I also actually heard first time about this just three weeks before, while watching the news in Bulgaria. The local people were protesting that this statement from the authorities ruins the tourism in Chernomorets and they loose money. They looked quite upset there, good that...
by Svilen
15 Sep 2019, 06:09
Forum: Spectrum
Topic: Menzenschwand, Germany
Replies: 8
Views: 122

Re: Menzenschwand, Germany

This was definitely a nice trip and mineral hunt you had there. I also don't know much about minerals, but maybe the black spots are small amounts of Uraninite in whatever rock matrix. You may also illuminate it with UV light to see if the yellowish substance is fluorescent, could be traces of Autun...
by Svilen
13 Sep 2019, 18:31
Forum: Detector drivers
Topic: Simple Arduino Pulse Rate Counter
Replies: 9
Views: 133

Re: Simple Arduino Pulse Rate Counter

I think just Arduinos's C++ syntax is extremly similar with Java's, and maybe therefore the confusion. But it is C++, even the first line of your program imports a C-header file that contains C function declarations ;) I'm not an expert, but I guess a JVM will also fill Arduino's memory several times.
by Svilen
13 Sep 2019, 03:43
Forum: Detectors
Topic: Mirion PDS 100G, Spectrometric Personal Radiation Detector
Replies: 51
Views: 961

Re: Mirion PDS 100G, Spectrometric Personal Radiation Detector

Thank you for your reply and analysis, Massimo. Yes, I may be wrong about the Pa-234m and then is all good. I noticed that about the saved spectra, but just didn't think about it when I took the pictures, since I was more concentrated in the energies, than the dose rate. Maybe still a bit of fine tu...
by Svilen
12 Sep 2019, 23:08
Forum: Detector drivers
Topic: Simple Arduino Pulse Rate Counter
Replies: 9
Views: 133

Re: Simple Arduino Pulse Rate Counter

Hi Steven,
Maybe you can use something like this, to shorten the summing of all these array elements:

Code: Select all

for(i=0; i<30; i++)
    {
        sum = sum + cps[i];
    }
by Svilen
12 Sep 2019, 17:26
Forum: Detector drivers
Topic: Simple Arduino Pulse Rate Counter
Replies: 9
Views: 133

Re: Simple Arduino Pulse Rate Counter

Yes, I know that about it, but thought the language is based on C not Java. Thanks Steven.
by Svilen
12 Sep 2019, 09:29
Forum: Detector drivers
Topic: Simple Arduino Pulse Rate Counter
Replies: 9
Views: 133

Re: Simple Arduino Pulse Rate Counter

Nice little counter indeed. Isn't the Arduino coded with some modified C++?
by Svilen
12 Sep 2019, 09:05
Forum: Detectors
Topic: Mirion PDS 100G, Spectrometric Personal Radiation Detector
Replies: 51
Views: 961

Re: Mirion PDS 100G, Spectrometric Personal Radiation Detector

I can happily announce that I also became a part of the PDS-100G owners group few days ago. It's quite nice device, fast, sensitive and portable. Not cheap, but a good deal, especially having in mind the price for a new one of that type. Connected to a tablet it's really a very portable spectrometer...