Abstract

A description of an extensive measurements program of the shielding properties of the Brookhaven AGS earth shield is given. It is concluded that the secondary radiations from an internal target are inversely dependent on the square of the distance from the target and the square of the angle to the primary beam after a constant background has been subtracted; that the transverse attenuation of the particle populations in the shield has an exponential decay constant of 83 g/cm 2, with some evidence of a weakly interacting tail after 20 ft.

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