Marchetti, A.A.; McAninch, J.E.; Rugel, G.; Ruhm, W.; Korschinek, Gunther; Martinelli, R.E.; Faestermann, T.; Knie, K.; Egbert, S.D.; Wallner, Anton; Wallner, C.
The first measurements of63Ni produced by A-bomb fast neutrons (above ~1 MeV) in copper samples from Hiroshima encompassed distances from ~380 to 5062 m from the hypocenter (the point on the ground directly under the bomb). They included the region of interest to survivor studies (~900 to 1500 m) and provided the first direct validation of fast neutrons in that range. However, a significant measurement gap remained between the hypocenter and 380 m. Measurements close to the hypocenter are...[Show more]
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