Delayed muons in extensive air showers and double-front showers
- Russian Academy of Sciences, Lebedev Institute of Physics (Russian Federation)
- Al-Farabi Kazakh National University (Kazakhstan)
The results of a long-term experiment performed in the period between 1995 and 2006 with the aid of the MUON-T underground (20 mwe) scintillation facility arranged at the Tien Shan mountain research station at an altitude of 3340 m above sea level are presented. The time distribution of delayed muons with an energy in excess of 5 GeV in extensive air showers of energy not lower than 106 GeV with respect to the shower front was obtained with a high statistical significance in the delay interval between 30 and 150 ns. An effect of the geomagnetic field in detecting delayed muons in extensive air showers was discovered. This effect leads to the asymmetry of their appearance with respect to the north-south direction. The connection between delayed muons and extensive air showers featuring two fronts separated by a time interval of several tens of to two hundred nanoseconds is discussed. This connection gives sufficient grounds to assume that delayed muons originate from the decays of pions and kaons produced in the second, delayed, front of extensive air showers.
- OSTI ID:
- 21448995
- Journal Information:
- Physics of Atomic Nuclei, Vol. 72, Issue 11; Other Information: DOI: 10.1134/S1063778809110088; Copyright (c) 2009 Pleiades Publishing, Ltd.; ISSN 1063-7788
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COSMOLOGY AND ASTRONOMY
ALTITUDE
ASYMMETRY
DECAY
DISTRIBUTION
ELECTRIC GROUNDS
EXTENSIVE AIR SHOWERS
GEOMAGNETIC FIELD
GEV RANGE
KAONS
MOUNTAINS
MUONS
PIONS
SCINTILLATIONS
SEA LEVEL
UNDERGROUND
BOSONS
COSMIC RADIATION
COSMIC SHOWERS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRONS
IONIZING RADIATIONS
LEPTONS
LEVELS
MAGNETIC FIELDS
MESONS
PSEUDOSCALAR MESONS
RADIATIONS
SECONDARY COSMIC RADIATION
SHOWERS
STRANGE MESONS
STRANGE PARTICLES