Latitude Effect of Cosmic Radiation

Hoerlin, Herman

doi:10.1038/132061a0

Cited by 8 publications

(1 citation statement)

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“…His student Hermann Hoerlin, a keen climber, with support from the Deutscher und Oesterricher Alpverein, made measurements of cosmic ray 260 ionisation in the Peruvian Andes at altitudes up to 6100 m. On the outward and return voyages he was able to make extensive measurements of the cosmic ray intensity as a function of latitude. Data taken on the homeward voyage from the Straits of Magellan to Hamburg form a remarkable record (Hoerlin, 1933) and confirmed the results of Clay and Berlage (1932) and of Compton (1933) obtained only slightly earlier: Hoerlin's work preceded that of Millikan. Hoerlin too married a woman with Jewish ancestry and they emigrated to the United States in 1938.…”

Section: Appendix A: Regener's Influence Through His Relations Studen...supporting

confidence: 80%

Erich Regener and the ionisation maximum of the atmosphere

Carlson¹,

Watson

2014

Hist. Geo Space. Sci.

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Abstract. In the 1930s the German physicist Erich Regener did important work on the measurement of the rate of production of ionisation deep under water and in the atmosphere. Along with one of his students, Georg Pfotzer, he discovered the altitude at which the production of ionisation in the atmosphere reaches a maximum, often, but misleadingly, called the Pfotzer maximum. Regener was one of the first to estimate the energy density of cosmic rays, an estimate that was used by Baade and Zwicky to bolster their postulate that supernovae might be their source. Yet Regener's name is less recognised by present-day cosmic ray physicists than it should be, largely because in 1937 he was forced to take early retirement by the National Socialists as his wife had Jewish ancestors. In this paper we briefly review his work on cosmic rays and recommend an alternative naming of the ionisation maximum. The influence that Regener had on the field through his son, his son-in-law, his grandsons and his students, and through his links with Rutherford's group in Cambridge, is discussed in an appendix. Regener was nominated for the Nobel Prize in Physics by Schrödinger in 1938. He died in 1955 at the age of 73.

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Section: Appendix A: Regener's Influence Through His Relations Studen...supporting

confidence: 80%