Discovery of Cosmic Rays
2013 (English)In: Centenary Symposium 2012: Discovery Of Cosmic Rays / [ed] Ormes, JF, American Institute of Physics (AIP), 2013, 9-16 p.Conference paper (Refereed)
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. 9-16 p.
, AIP Conference Proceedings, ISSN 0094-243X ; 1516
Cosmic rays. Hess
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:kth:diva-121623DOI: 10.1063/1.4792532ISI: 000316575600002ScopusID: 2-s2.0-84874896827ISBN: 978-0-7354-1137-1OAI: oai:DiVA.org:kth-121623DiVA: diva2:619367
Centenary Symposium on Discovery of Cosmic Rays, JUN 26-28, 2012, Denver, CO
QC 201305032013-05-032013-05-032013-05-03Bibliographically approved