On Sun, Feb 28, 2016 at 6:44 PM, Jones Beene <[email protected]> wrote: > -----Original Message----- > From: H LV > >> In the Lugano test dosimeters were used to check for gamma/xray emissions at >> more than 50 cm from the reactor... over the 32 day duration test it looks >> like the dosimeters didn't record anything above background... If the MFMP >> reactor resembles the Lugano reactor why didn't the dosimeters register any >> radiation? > > > I may sound like a broken record on this but it is fairly obvious: remove the > lead bricks - the "apparent" radiation goes away. No lead at Lugano. > > The operative difference was the bricks. The lead captures muons which are > documented by the adjoining scintillator as gamma radiation. Some of the > muons are cosmic but some can be produced in the Holmlid effect. > This can be easily tested next time around: remove the lead - the apparent > radiation goes away. In a thesis which was referenced earlier on the known > muon interaction with lead: > > "overall the study has demonstrated that effects such as neutron production > in Pb shielding from muon interaction is an important effect in sensitive GRS > experiments as the > secondary/tertiary neutrons produced may interact with target nuclei to > produce γ-ray events which could not be accounted for otherwise" > > https://webcache.googleusercontent.com/search?q=cache:OzhUEPLFX44J:https://researchbank.rmit.edu.au/eserv/rmit:161164/Turnbull.pdf+&cd=11&hl=en&ct=clnk&gl=us#87 >
This paper might be a good resource so here is a link which displays all the charts and pictures. https://researchbank.rmit.edu.au/eserv/rmit:161164/Turnbull.pdf It is just my opinion, but I doubt that muons interacting with lead would be capable of generating the observed the spectrum. However, couldn't muons and electrons could both generate Bremsstrahlung radiation? harry
