Recent content by Sergey_KGB

Many thanks for interesting information. I have found a description of standard, accredited method to conduct a test fo Po-210 using alpha spectrometry, including very low concentrations. https://wiki.ceh.ac.uk/display/~jc.mora@ciemat.es/polonium-STUK There exists well known method (using...

As I pointed out previously I'm not an expert. So I have some simple questions addressed to true experts. - what is a typical size of a sample during Gamma spectrometry? - what is minimal stream of gamma photons to (photon/sec) required by Gamma spectrometers? - what is energy resolution of...

I would agree with you if alpha activity of a sample is relatively low. Precise Alpha spectrometry in this case is not possible. For exact spectrum we need very thin source but in this case stream of alpha particles would be too weak to make measurements. But in our case it is claimed that...

I wrote about the cause previously. Only one in 100,000 Alpha decays of Po-210 causes emission of Gamma photon with energy 803KeV. So if we have a sample with Po-210 activity of 49,000 Bq/g then 10mg would produce 490 emissions of Alpha particles per second but 1kg is required to produce 490...

Anyway, Po-210 has only one line on Alpha spectrum while U-232 has 2 lines. Indeed, due to cause outlined by you, they are not lines exactly but rather Gaussian-shape curves (very sharp however). Po-210 would produce one such a curve but U-232 two with amplitudes in proportion 7:3 (according to...

According to the report both Gamma and Alpha spectrometry are avilable and were used. Thus there is nothing to hide.

Yes, it is much easier to detect Gamma rays. But if samples that allegedly contain Po-210 are tested then Gamma spectroscopy is useless from my point of view. It is my point and I would like to hear learned opinion of experts (I'm not an expert in this area at all).

Yes, my late Father was a KGB colonel (military counter-intelligence) but I myself absolutely unconnected to KGB, FSB and so on. I'm just a private person. KGB addition to my real name is just for fun. My interest is purely scientific one. It is not just an article but Final report and it is an...

If {Vn} and {In} are series of samples (voltage and current) then P - active power is a sclar multiplication P=ΣVn*In and thus is a scalar value while voltage and current are vectors. Though RMS values of both voltage and current are scalar values (length of respective vectors).

Once, I supervized installation of meteting equipment on Power Substation 220KV in Bashkortostan (Russia). Our device showed that nearby plant consumes only 0.5MW of active power but generates 10MVAR of reactive power (due to heating inductors that were switched off just before the measurement)...

Hi Everybody! Just have read in the Report into the death of Alexander Litvinenko https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/493860/The-Litvinenko-Inquiry-H-C-695-web.pdf I'm very surpised to see that namely Gamma Spectrometry was used while only 1 in 100,000...

Graduated in Moscow university in 1979. Candidate in Physical and Mathematical science (1982). Mathematician, Theory of functions of real variabe. Dissertation - 'Convergence of Orthogonal series' Worked as a lecturer in High School (Informatics). Programmer for many years. Now specialist in...