maxfomitchev

Saint Gobain Enhanced Lanthanum Bromide Detector

Posted on September 13, 2020October 20, 2022 by maxfomitchev

Lanthanum Bromide Advantage Lanthanum bromide scintillators are gaining popularity due to their superior resolution properties. Typical resolution of a LaBr3(Ce) scintillation detector @ 661.7 keV is between 2.5 and 3.5% depending on manufacturer and crystal grade. Thus, LaBr3(Ce) detector resolution ... Read More

SNMO-5 BF3 Neutron Detector

Posted on September 12, 2020October 20, 2022 by maxfomitchev

SNMO-5 is a neutron detector (proportional counter) filled with boron trifluoride enriched with boron-10 - Fig. 1. The tube is 10.5" long and has a diameter of 1.375". These dimensions are comparable to the size of helium-3 filled SNM-18 tube. ... Read More

Nature vindicates Weber Electrodynamics?

Posted on July 22, 2020October 20, 2022 by maxfomitchev

Weber Beats Lorentz! An earth shattering breakthrough has appeared in the July issue of Nature. Measurements of trajectories of electrons passing through a flattened solenoid strongly favor Weber's force law and Weber Electrodynamics as opposed to Lorentz force law, which ... Read More

Saint Gobain Brilance 38S38 LaBr3 Detector

High-Resolution Spectrometry with LaBr3

Posted on June 27, 2020October 20, 2022 by maxfomitchev

Cerium-doped lanthanum bromide / LaBr3(Ce) scintillators offer better resolution and greater stopping power when compared to conventional thallium-doped sodium iodine / NaI(Tl) scintillators. E.g. a typical 1.5" x 1.5" LaBr3(Ce) crystal achieves a 2.5-3.5% FWHM @ 662 keV resolution compared ... Read More

Neutron Detection Best Practices

Posted on June 10, 2020October 20, 2022 by maxfomitchev

I have created a presentation that summarize best practices of neutron radiation detection. Download English versionDownload Russian version

Gamma Detection Best Practices

Posted on May 27, 2020October 20, 2022 by maxfomitchev

I have created a presentation that summarize best practices of gamma radiation detection. Download English versionDownload Russian version

Non-Thermal Neutron Detection with Helium-3 Proportional Counter

Posted on May 25, 2020October 20, 2022 by maxfomitchev

Helium-3 proportional counters are generally used to detect thermal neutrons and therefore produce thermal neutron spectrum, which looks the same regardless of the energy of the neutron source. Obviously, in order to detect thermal neutrons fast neutrons first must be ... Read More

Background Gamma Spectrum

Posted on May 13, 2020October 20, 2022 by maxfomitchev

Here is a high-energy background gamma spectrum I have captured for 10 hours using GAMMA-PRO 5" system - Fig. 1. I had to lower detector bias to 600V to prevent the highest energy gamma events from clipping. Fig. 1. High-energy ... Read More

Thermal neutron spectrum comparison at different bias voltages

Evolution of Neutron Spectrum with Detector Bias

Posted on May 12, 2020October 20, 2022 by maxfomitchev

The shape of a thermal neutron spectrum produced by a Helium-3 filled proportional counter tube generally depends on bias voltage. Three things happen with the increase in bias voltage: Pulse amplitude increases (which helps with noise rejection);Pulse rise time increases;The ... Read More

Search for Alpha Decay Acceleration

Posted on May 9, 2020October 20, 2022 by maxfomitchev

Abstract Bismuth nitrate solution exposed for 30-60 minutes to a strong electrostatic field (-20 kV potential, ~10 MV/m field strength) exhibits significant alpha, beta and gamma activity. However, the in-depth investigation using the Automated Nuclear Lab system has shown that ... Read More

RELIABLE NEUTRON AND GAMMA DETECTION

Author: maxfomitchev