  The cosmic rays data collected using a large area plastic scintillator array
ISMRAN (Indian Scintillator Matrix for Reactor AntiNeutrino) are presented. The
data collected serve as a useful benchmark of cosmogenic background in a
non-reactor environment for the future measurements of electron-antineutrinos
to be performed using the ISMRAN setup. The zenith angle distribution of the
atmospheric muons has been measured and compared with Monte Carlo expectations.
The detector setup was further used to measure the lifetime distribution of
stopped muons and extract their rates inside the detector matrix. The measured
spectra of decaying muons and associated electrons show a good agreement with
the MC simulations performed through GEANT4 simulation.
