A NOTE ON THE ZENITH ANGLE DEPENDENCE OF COSMIC RAY PROTONS AT SEA LEVEL

1956 ◽  
Vol 34 (10) ◽  
pp. 1081-1086 ◽  
Author(s):  
K. W. Ogilvie
Keyword(s):  
Sea Level ◽  
Zenith Angle ◽  
Cosmic Ray ◽  
Angle Dependence

scholarly journals Zenith Angle Dependence of Cosmic Ray Shower Development from Observations of the Time Structure of Atmospheric Cerenkov Pulses

1980 ◽  
Vol 33 (3) ◽  
pp. 607 ◽  
Author(s):  
RW Clay ◽  
GJ Thornton
Keyword(s):  
Sea Level ◽  
Zenith Angle ◽  
Cosmic Ray ◽  
Time Structure ◽  
Extensive Air Showers ◽  
Attenuation Length ◽  
Air Showers ◽  
Angle Dependence ◽  
Shower Development

The attenuation of extensive air showers has been studied using atmospheric Cerenkov techniques. Observations over a range of zenith angles are correlated and an attenuation length of 234 � 38 g cm ? 2 obtained for showers with sea-level sizes of ~ 106 ?

Investigation of the zenith angle dependence of cosmic-ray muons at sea level

Pramana ◽  
2013 ◽  
Vol 80 (5) ◽  
pp. 837-846 ◽  
Author(s):  
MEHMET BEKTASOGLU ◽  
HALIL ARSLAN
Keyword(s):  
Sea Level ◽  
Zenith Angle ◽  
Cosmic Ray ◽  
Angle Dependence

The Zenith Angle Dependence of Cosmic-Ray Protons

1954 ◽  
Vol 93 (3) ◽  
pp. 590-595 ◽  
Author(s):  
Charles E. Miller ◽  
Joseph E. Henderson ◽  
David S. Potter ◽  
Jay Todd ◽  
Wayne M. Sandstrom ◽  
...  
Keyword(s):  
Zenith Angle ◽  
Cosmic Ray ◽  
Angle Dependence

THE ZENITH ANGLE DEPENDENCE OF COSMIC RAY PROTONS

1953 ◽  
Author(s):  
F.M. CHARBONNIER ◽  
W.M. SANDSTROM
Keyword(s):  
Zenith Angle ◽  
Cosmic Ray ◽  
Angle Dependence

Variation with Zenith Angle of the Integral Intensity of Muons near Sea Level

1972 ◽  
Vol 50 (8) ◽  
pp. 843-848 ◽  
Author(s):  
R. W. Flint ◽  
R. B. Hicks ◽  
S. Standil
Keyword(s):  
Theoretical Model ◽  
Sea Level ◽  
Zenith Angle ◽  
Integral Intensity ◽  
Cosmic Ray ◽  
Muon Flux ◽  
Experimental Measurements ◽  
A Current ◽  
Made In

The integral intensity of the cosmic ray muon flux (> 0.28 GeV/c) near sea level has been measured in the zenith angle range 75–90°. Very few other experimental measurements have been made in this range. The present results agree closely with the predictions of a current theoretical model except at very large zenith angles, where the measured intensities are somewhat higher than predicted.

GEANT4 SIMULATION FOR THE ZENITH ANGLE DEPENDENCE OF COSMIC MUON INTENSITIES AT TWO DIFFERENT GEOMAGNETIC LOCATIONS

2013 ◽  
Vol 28 (16) ◽  
pp. 1350071 ◽  
Author(s):  
HALIL ARSLAN ◽  
MEHMET BEKTASOGLU
Keyword(s):  
Sea Level ◽  
Zenith Angle ◽  
Geant4 Simulation ◽  
Cutoff Rigidity ◽  
Angle Dependence ◽  
Cosmic Muon ◽  
Geomagnetic Cutoff Rigidity ◽  
Geomagnetic Cutoff ◽  
Muon Momentum ◽  
Muon Intensity

The zenith angle dependence of cosmic muon flux at sea level in the western, eastern, southern and northern azimuths have been investigated separately for Calcutta, India and Melbourne, Australia for muon momenta up to ~500 GeV /c using Geant4 simulation package. These two locations were selected due to the fact that they significantly differ in geomagnetic cutoff rigidity. The exponent n, which is defined by the relation I(θ) = I(0°) cos nθ, was obtained for each azimuth in Calcutta and Melbourne. By acquiring an agreement between the simulation results and the experimental ones, the simulation study was extended for different azimuth angles and higher muon momenta. It was shown that the angular dependence of the cosmic muon intensity decreases with the increase of muon momentum at both locations. Moreover, the exponent becomes independent of both geomagnetic location and the azimuth angle for muons with momentum above 10 GeV /c, and it is nearly zero above 50 GeV /c. Therefore, it can be concluded that the cosmic muons with momenta between 50 GeV /c and ~500 GeV /c reach the sea level almost isotropically.

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