TITLE:
The Neutron Flux Variation in the Earth’s Atmosphere Depending on the Solar Proton Flux
AUTHORS:
Marina Poje, Branko Vuković, Maja Varga Pajtler, Vanja Radolić, Igor Miklavčić, Josip Planinić
KEYWORDS:
Cosmic Radiation; Solar Radiation; Galactic Component; Forbush’s Decrease
JOURNAL NAME:
Atmospheric and Climate Sciences,
Vol.3 No.4,
September
6,
2013
ABSTRACT:
The Earth is continually exposed to the cosmic radiation of both
solar and galactic origin. Solar eruption and solar ac- tivity may affect
cosmic radiation flux density which has a secondary effect on the flux of
particles in the atmosphere as well. Such one event was recorded in the last
week of October 2003, where the measured dose rate of the cosmic radia- tion in
the aircraft ATR 42 was 1.8 times higher than the average value of the
other measurements. Later we found the data on an unusual solar activity in the
mentioned time interval. Analysis of the increasing solar proton flux during
the solar flare, as well as the decreasing neutron flux in the atmosphere
(representing the galactic radiation), on May 14 and 15, 2005, showed a
nonlinear correlation with the exponential equation of regression; this one
described galactic ray modulation by solar flux during the short term variation
of cosmic radiation.