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Points from Foregoing Letters

Nature volume 143, page 605 (08 April 1939) | Download Citation



FROM an observed asymmetry in the spatial distribution of the explosion fragments from uranium bombarded by fast neutrons, N. Feather concludes that less than 5 × 10-13 sec. must elapse between the capture of a neutron by the nucleus and the break-up of the system into two heavy fragments. Previously, more direct methods of investigation had indicated that this time must be less than 0.003 sec.

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