Hans Bethe - Pleasing results from the experiments (152/158)
643 views · Published 26 June 2017 · 1:40 · Indexed 24 October 2026
Channel: Web of Stories - Life Stories of Remarkable People · 2017 · Science & Technology
To hear more of Hans Bethe’s stories, go to the playlist: https://www.youtube.com/watch?v=LvgLyzTEmJk&list=PLVV0r6CmEsFyUDSroBQVEcbnNud7I9xom German-born theoretical physicist Hans Bethe (1906-2005) was one of the first scientists to join the Manhattan Project, later strongly advocating nuclear disarmament. In 1967, he was awarded the Nobel Prize in Physics for his theory of stellar nucleosynthesis. [Listener: Sam Schweber; date recorded: 1996] TRANSCRIPT: I mentioned the gallium experiment which was done both in... in Russia and in Italy. At first they got different results, but after a while they began to agree quite well, and it turned out that these slow neutrinos, that is low energy neutrinos which come from the initial reaction, proton plus proton, are observed essentially in the right number. The agreement between the Russian and the Italian experiment was very satisfactory and it was of course very nice that it gave about the correct number for the low energy neutrinos. But then the real puzzle was: high energy neutrinos reduce to a half; medium energy neutrinos reduce probably to nothing; low energy neutrinos recorded in full strength; and as far as I can see the Smirnov theory, that is MSW Theory, is the only reasonable way to explain that.
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