Walther Bothe (1891–1957) was a German physicist who received the Nobel Prize in Physics in 1954 for his work in the field of nuclear physics. He is best known for his development of techniques for the study of cosmic rays and for his contributions to the discovery of the existence of mesons. Bothe, along with his collaborator, was instrumental in the development of the coincidence method, which allowed scientists to detect elementary particles.
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A physicist.[ref]
https://www.mpg.de/957380/10_person3-1954. Independent professional biography and identity
Portrait of Walther Bothe
. Nobel Foundation; individual photographer unidentified. Commons PD-Sweden photograph claim. File requests an additional United States public-domain tag; worldwide status is not asserted., via Wikimedia Commons. Source.