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OPERATION SANDSTONE. Scientific Director's Report of Atomic Weapon Tests. Annex 4. Part 1. Threshold Detector Measurement of High Energy Neutron.
LOS ALAMOS NATIONAL LAB NM
The activity induced in various threshold detectors by the radiation from the Sandstone bombs has been measured. All measurements were made without collimation. The results indicate that the efficiency of a bomb cannot be determined by observing the number of neutrons above three million electron volts energy, but that the tonnage may possibly be proportional to the number of very high energy gamma rays produced.
Sandstone rept. no. 18,
Extracted version of report dated 14 Feb 49.