The most important facet that was totally omitted from 'Copenhagen' was that Heisenberg knew of the exact # of enriched U-235 necessary (43.5 lbs), perhaps as far back as 1939. This he intentionally exagerated by a factor of 1000 as written, only to be taken as 'true' by the allies--led by Bethe, of course. Much to their amazement, a week after Hiroshima Heisenberg, in voluntary internment, gave an impromptu three-hour lecture --the famous 'pineapple' story-- describing with great precision how the bomb should be made. Bethe was quickly made aware of the lecture, but continued to chortle on how the 'great' Heisenberg blundered with the math! The Copenhagen story is told from the pov of Bohr, his son, and his wife. As such, it's a justification for Bohr's personal decision to help the allies as best he could with the Manhattan Project. As he knew little of the real dynamics of fission, his job, per the pleading of Bethe, was to influence Heisenberg (ex student) to come over. With, Heisenberg, the allies could have had the bomb in '43. For him, S-matrix was far more important, Bomb stuff was what you padoodled on the back of a napkin at lunchtime. The most imortant fact,by far, is that all three developers of the real chain (238>235 sequences & potentials) --Heisenberg, Meitner, and Hahn, were passionately anti-bomb. Even had there been a non-Heisenberg development in Germany of the fission chain at bomb speed ( a slow-down, actually!), the physical testing would have been sabotaged by Hahn. In essence, although I enjoyed Copenhagen, it somewhat disorients history by front-loading philosophical questions with statements assumed as true from a semi-blind pov. Again, Bohr would not have understood that Heisenberg already knew how to build a bomb because he lacked the requisite knowledge of various fissile speeds, etc. There is no evidence that Heisenberg told him. Despite the constant chattering of the Bohr family (ostensibly to justify dad's pro-bomb position), Heisenberg remained silent; it's this silence which hovers over the play. Eva
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