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Type of Document	Dissertation
Author	Fletcher, James C.
URN	etd-04122004-162257
Persistent URL	http://resolver.caltech.edu/CaltechETD:etd-04122004-162257
Title	Cloud chamber studies of cosmic rays
Degree	PhD
Option	Physics
Advisory Committee	Advisor Name Title C.D. Anserson Committee Chair
Keywords	none
Date of Defense	1948-01-01
Availability	unrestricted
Abstract The large magnet and 22" diameter cloud chamber constructed by Dr. S. H. Neddermayer and Dr. C. D. Anderson has been used in an attempt to observe mesotron disintegrations at sea level. Although no recognizable disintegrations were observed, useful data concerning energy loss of charged particles in carbon were obtained. It was found that the present theory of energy loss of electrons first derived by Bloch and others is in very good agreement with the experimental results for the energy range 3-25 Mev. Also the results obtained provide good agreement with the theory of knock-on production by mesotrons for knock-ons whose energies lie in the range of 2-50 Mev. It is believed that information about knock-ons of somewhat higher energies than this would be quite useful in determining some of the properties of the mesotron.
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