Enhancement of Secondary Gamma Radiation Flux Energies in the Energy Region from 1400 Kev to 1500 Kev during Lunar Eclipse on June 16, 2011 at Udaipur, India

Abstract

The lunar eclipse at Udaipur (270 43’ 12.00” N, 750 28’ 48.01” E), India was
experimentally observed on June 16, 2011 using ground-based NaI (Tl) scintillation
detector. Cadences of data were collected at intervals of half an hour. The analyzed data
revealed a significant enhancement in the energy region from 1400 keV to 1500 keV of
secondary gamma radiation flux (SGRF) on comparison to pre- and after lunar eclipse
days. On June 16, we observed additional peaks in the energy spectrum of SGR flux in the
energy region extending from 1461.010 keV to 1472.536 keV during the progress of lunar
eclipse. We interpret such enhancement of SGR flux energies on the basis of combined
phenomenon of gravitational lensing effect of Sun and Earth as well as the Sun’s magnetic
field and the interplanetary magnetic field. Due to such combined effect, primary cosmic and
solar radiations bend and may cause strong hitting on the less air surface of the Moon,
resulting into emission of secondary particle flux mostly gamma radiation, high energy
photo electrons, hard X -radiation, muons, protons and neutrons which may be regarded as
back scattering from the Moon surface. Energy of backscattered secondary flux is large
enough that it gives such enhancement in the energy region from 1400 keV to 1500 keV
during lunar eclipse observation. Also, due to combined gravitational effect, cosmic
radiation bent and impinged deep inside the atmosphere of Earth, producing a large shower
of secondary radiation particles. These collective effects may give such enhancement of
secondary gamma radiation flux energies.