MEASUREMENT OF THE COSMIC RAY NEUTRON FLUX AT 45 DEGREES GEOMAGNETIC LATITUDE.
MILAN UNIV (ITALY)
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In a series of balloons flights with a light-weight neutron detector, the flux of the cosmic ray neutrons in the atmosphere, at 45 degrees geomagnetic latitude, was investigated. The energy spectrum proposed by Newkirk 1963 was found to be in agreement with the experimental results. Values of the neutron flux through the atmosphere are given and, by extrapolation to zero pressure, the neutron leakage was determined as 0.45 0.07 neutron sq. cm sec. at the top of the atmosphere. A detailed study of the previous experiments on albedo neutrons which led to conflicting results was made and was shown that the apparent discrepancies can be accounted for by instrumental bias and locally produced neutrons. Author