I ask this as a lover of science and was a chemistry major in college. Physicists, Chemists among many other STEM studies heavily emphasize notes and documentation. Do we have access to his original notes? I know that we can view the original publications, but I’m very interested in the inner workings of a persons mind when they begin work like his.
Notes are a fascinating place to do this. I assume many societies treasure preserving Notebooks and manuscripts from the great minds of he yester-centuries.
If you are a Scientific Historian with experience in this. I’d love to know where I can view his or other Scientific historical notes.
There are unpublished materials (e.g. notes, letters, etc.) by Heisenberg from this time period. We also have extensive papers from Bohr (including his multiple, iterative drafts of everything that he ever wrote, often using an amenuensis who acted as a sort of interpreter of Bohr's thoughts). The Niels Bohr Archive in Copenhagen has materials of this sort, but there is also a Heisenberg Archive at the Max Planck Institute in Munich. Separately, there are several interviews and oral histories with both these men and many others they worked with (e.g. the Archive for the History of Quantum Physics, which has repositories in several locations, but notably in the Niels Bohr Library at the American Institute of Physics, in College Park, MD, USA), as well as extensive correspondence between them and their contemporaries (e.g. Wolfgang Pauli). The short answer is: there is a lot of stuff, though not everything is recorded in such things, and it takes an extensive research effort to acquire and make sense of such matters. If you are curious about these things, pick up a copy of David Cassidy's Uncertainty and Beyond Uncertainty and skim through the footnotes. It is not a primary source base one can easily just wade into; to really find and make sense of such things one requires a lot of time, it is the stuff that dissertations in the history of physics are made of.