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Discovery of Cosmic Rays
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
2013 (English)In: Centenary Symposium 2012: Discovery Of Cosmic Rays / [ed] Ormes, JF, American Institute of Physics (AIP), 2013, p. 9-16Conference paper, Published paper (Refereed)
Abstract [en]

The mysterious invisible radiation that ionized air was studied a century ago by many scientists. Finally, on 7 August 1912, Victor Hess in his seventh balloon flight that year, reached an altitude of about 5000 m. With his electroscopes on board the hydrogen-filled balloon he observed that the ionization instead of decreasing with altitude increased significantly. Hess had discovered cosmic rays, a discovery that gave him the 1936 Nobel Prize in physics. When research resumed after World War I focus was on understanding the nature of the cosmic radiation. Particles or radiation? Positive or negative? Electrons, positrons or protons? Progress came using new instruments like the Geiger-Muller tube and around 1940 it was clear that cosmic rays were mostly protons.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2013. p. 9-16
Series
AIP Conference Proceedings, ISSN 0094-243X ; 1516
Keywords [en]
Cosmic rays. Hess
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-121623DOI: 10.1063/1.4792532ISI: 000316575600002Scopus ID: 2-s2.0-84874896827ISBN: 978-0-7354-1137-1 (print)OAI: oai:DiVA.org:kth-121623DiVA, id: diva2:619367
Conference
Centenary Symposium on Discovery of Cosmic Rays, JUN 26-28, 2012, Denver, CO
Note

QC 20130503

Available from: 2013-05-03 Created: 2013-05-03 Last updated: 2013-05-03Bibliographically approved

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