Neutron production by cosmic-ray muons at shallow depth
نویسندگان
چکیده
~Palo Verde Collaboration! Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487 Department of Physics and Astronomy, Arizona State University, Tempe, Arizona 85287 Department of Physics, California Institute of Technology, Pasadena, California 91125 Physics Department, Stanford University, Stanford, California 94305 ~Received 23 June 2000; published 12 October 2000!
منابع مشابه
x / 00 06 01 4 v 1 1 3 Ju n 20 00 Neutron production by cosmic - ray muons at shallow depth
The yield of neutrons produced by cosmic ray muons at a shallow depth of 32 meters of water equivalent has been measured. The Palo Verde neutrino detector, containing 11.3 tons of Gd loaded liquid scintillator and 3.5 tons of acrylic served as a target. The rate of one and two neutron captures was determined. Modeling the neutron capture efficiency allowed us to deduce the total yield of neutro...
متن کاملSimulation of Cosmic Ray Muon Flux at Shallow Depths Underground
Geant4 has been used to estimate the rate, energy spectrum and angular distribution of cosmic ray muons at underground depths between 300 and 1000 m.w.e. The results agree well with those from the MUSIC program when the same surface spectrum is used. Care has been taken to use a parameterization of the surface spectrum which agrees well with data for the relevant energies. 1 Goals Knowledge of ...
متن کاملPion and neutron production by cosmic-ray muons underground.
The production of positive pions and neutrons by cosmic muons at underground sites of various depths is investigated. We first test the equivalent photon method in the particular case of ∆ excitation by the muon. We find that this method, when it neglects the momentum dependence of the transverse response, reproduces remarkably well the theoretical muon cross section. This success has lead us t...
متن کاملA measurement of the muon-induced neutron yield in lead at a depth of 2850 m water equivalent
We present results from the measurement of the neutron production rate in lead by high energy cosmic-ray muons at a depth of 2850 m water equivalent (mean muon energy of 260 GeV). A tonne-scale highly segmented plastic scintillator detector was utilised to detect both the energy depositions from the traversing muons as well as the delayed radiative capture signals of the induced neutrons. Compl...
متن کاملPredicting Neutron Production from Cosmic-ray Muons
Fast neutrons from cosmic-ray muons are an important background to underground low energy experiments. The estimate of such background is often hampered by the difficulty of measuring and calculating neutron production with sufficient accuracy. Indeed substantial disagreement exists between the different analytical calculations performed so far, while data reported by different experiments is n...
متن کامل