Publications

Multi-depth Measurement of Fast Neutrons

Marleau, Peter M.; Gerling, Mark D.; Sweany, Melinda; Cabrera-Palmer, Belkis C.; Brennan, James S.

A spallation based multiplicity detector has been constructed and deployed to the Kimballton Underground Research Facility to measure the cosmogenic fast neutron flux anti-coincident from the initiating muon. Two of the three planned measurements have been completed ( ,,, 380 and , -- , 600 m.w.e) with sufficient statistics. The third measurement at level 14 (-4450 m.w.e.) is currently being performed. Current results at - , 600 m.w.e. compare favourably to the one previous measurement at 550 m.w.e. For neutron energies between 100 and 200 MeV measurements at , -- , 380 m.w.e. produce fluxes between 1e -8 and 7e -9 n/cm 2 /s/MeV and at , - , 600 m.w.e. measurements produce fluxes between 7e -9 and 1e- 11 n/cm2 /s/MeV.