منابع مشابه
EMMA – A New Underground Cosmic-Ray Experiment
A new type of cosmic-ray experiment is under construction in the Pyhäsalmi mine in the underground laboratory of the University of Oulu, Finland. It aims to study the composition of cosmic rays at and above the knee region. The experiment, called EMMA, will cover approximately 150 m of detector area. The array is capable of measuring the multiplicity and the lateral distribution of underground ...
متن کاملTime Delays in Cosmic Ray Propagation
Cosmic Rays (CR) travel at speeds essentially indistinguishable from the speed of light. However whilst travelling through magnetic fields, both regular and turbulent, they are delayed behind the light since they are usually charged particles and their paths are not linear. Those delays can be so long that they are an impediment to correctly identifying sources which may be variable in time. Fu...
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 کاملMuon Inelasticity in Underground Cosmic -ray Ne Utrino Interactions*
The inelasticity of the secondary muon. in high-energy neutrino interactions, defined in a manner appropriate for the deep-mine cosmic-ray experiments, is computed. On the basis of the hypothesis of locality of the Iepton current, < E,/EV> = 0 0 62 f 0.12. (Submitted to Nuovo Cimento.) * Work supported by the U. S. Atomic Energy CGmmission. In order to interpret underground cosmic-ray neutrino ...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1951
ISSN: 0033-068X
DOI: 10.1143/ptp.5.844