Robert Bacher: I presented this [the discovery of the neutron] in the seminar and there were a good many questions. Some people were skeptical. I convinced Ed Condon almost immediately. In fact, within the week we had written a note together on the spin of the neutron because you could work it out. This part of it fit into the things of nuclear spins, hyperfine structure, nuclear moments, and so on. A good many other people came around to it. I think more than half the people were convinced at that time.
J. Robert Oppenheimer
Owen Gingerich: This is an interview between Owen Gingerich and Robert Wilson. You use your middle initial. It’s Robert R.?
Robert Wilson: Yes, usually.
Gingerich: Robert R. Wilson, who is a builder of high energy accelerators and who was one of the physicists at Los Alamos. We are speaking today in Philadelphia, where we both happen to be for the American Philosophical Society. It’s April 22. No, it’s Shakespeare’s birthday. It’s April 23. That’s the documentation for the day.
[Many thanks to Thomas Scanlan for recording and donating this interview to the Atomic Heritage Foundation.]
Thomas Scanlan: —Is part of an interview, which I held with Professor Marvin Wilkening at his home on Socorro, New Mexico on July 15, 1995.
Now, I was reading that you had worked at four different places associated with the Manhattan Project.
Marvin Wilkening: That’s right.
Scanlan: Was your first work with [Enrico] Fermi at Chicago?
Cindy Kelly: Okay, I am Cindy Kelly, Atomic Heritage Foundation. It’s August 9, 2016 and we are in Berkeley, California. I have with me Esther Floth. Our first question I want to ask is for her to tell us your name and to spell it.
Esther Floth: My name is Esther Marie Green Floth. It’s E-S-T-H-E-R; last name F as in “friendly,” L-O-T-H.
Kelly: Great. Esther, tell us something about your beginnings. When were you born and where were you born, and something about your childhood.
Owen Gingerich: Professor Roy Glauber is a physicist, a physicist who had an early start in physics because when he was still an undergraduate at Harvard, it was during World War II. A mysterious caller knocked on his dormitory door, and asked him if he would want to participate in some unspecified kind of scientific war work. He ended up going to Los Alamos as one of the youngest scientists in that scientific community working to make the atomic bomb. Of course there in Los Alamos, Robert Oppenheimer was the director.
Lee DuBridge: So, yeah, we thought it was an exciting time to have the AEC [Atomic Energy Commission]. We knew, of course, that they were going ahead with the weapon development, but also they were going to support Brookhaven and other research centers around the country. So, no, I think those of us who were not imminently in the Manhattan District, but aware of it, were quite excited about getting in and finding out more about really what was going on and what the new possibilities were, both in physics and in weapon technology.
Martin Sherwin: Okay, this is the middle of an interview with Norris Bradbury.
Norris Bradbury: The fact that I wasn’t particularly involved in these discussions, of the type which the Federation of Atomic Scientists started—they started here, of course. I suppose I was committed to running a laboratory and trying to get people to stay here, while I was not uncommitted to international control of nuclear weapons, for heaven’s sakes. No one could be.
Louis Hempelmann: He [J. Robert Oppenheimer] just told me what the situation was. He did not ask me, which is the same thing when he got sick because I was in the radiology department here and I knew something about it. He would call me up, tell me what he had done, and then say “What do you think of it?” By that time, the only thing I could say was, “That was fine.”
Martin Sherwin: Was there a lot of effort to trying to figure out the psychology that the people who were sitting in judgement [at J. Robert Oppenheimer’s security hearing] would have? That “They will probably be thinking this, so therefore we should do that?” Do you recall any of that?
Verna Hobson: No. I remember that after the first—they came back, I suppose, the weekend in the middle of the hearings. I think they had a few days, and then they came back, and then they went to Washington again for the rest of it.
Jean Bacher: Ruth Valentine said, “I shall take Ruth [Tolman]’s desk.” She always saved letters. She had marvelous long letters from Robert, you know, especially at the time of the hearings. I knew they were just terribly close and shared a great deal. On the drawer of the desk, she’d said, “Destroy these.”
Martin Sherwin: You saw it happen?
Bacher: I didn’t see her burn it, because at that time we still burned and they just threw them out in the burner in the back yard.