Speaker
Description
The NEMESIS experiment (New Emma MEasurement with neutronS In cosmic Showers)
is located in Pyhasalmi Mine (Finland), and operates at a depth of 75 m (210 m.w.e.),
corresponding to 50 GeV cutoff energy for vertical muons.
The experiment consists of a pixelized (11cm x 11cm) scintillation
telescope, 14 helium counters, 2 1m^2 scintillating detectors,
and Pb target. The scintillation telescope detect the cosmic ray muons
passing through the Pb-target, while the helium counters detect the
neutrons produced in Pb. The aim of the experiment is to precisely
investigate production of neutrons and check whether it is well described
by simulations. This is important for experiments which look for rare
phenomenas, as the detector shelters are often made of lead.
Detector was measuring for one year. One of the parameter is
neutron yield per muon. Preliminary analysis of our data
show the yield equal to 4.5 (+/- 0.5) e-4 per square centimeter
per gram or the mean for muon energy = 50 GeV. This result is similar
to yields reported in the literature.
This work was financially supported by the EU (INTERREG for Baltic Sea
program) as part of the BSUIN project, and by the Polish Ministry
of Science and Higher Education (grant no. 3988/INTERREG BSR/2018/2).
Keywords
muons,neutron production, underground
| Subcategory | Experimental Results |
|---|---|
| Collaboration | other (fill field below) |
| other Collaboration | NEMESIS |
