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Frauenfelder, Hans Cook, Dwight Dexter 2011-07-11T17:00:40Z 2011-07-11T17:00:40Z 1969 We have performed a geophysical search for fractionally charged particles (mainly ql quarks) in sea water and rock sample's. The samples,chosen were ten rock samples, which are believed to have been at the earth's surface for a long time, and two three-liter sea water samples. The samples were run through cation exchange columns to separate most of the material from particles of charge ±.2/3 and ± 1/3. The purified samples were then evaporated in an electron gun, which accelerated the negatively charged particles to a solid state detector. The pulse height spectra from the detector were scanned for peaks corresponding to particles of a charge between minus one and zero. No such particles were found. The concentration of ql quarks in the rock samples was < 10^-23 quarks/nucleon and in the sea water samples was ~< 10^-24 quarks / nucleon. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-11T17:00:40Z No. of bitstreams: 1 1969_cook.pdf: 1829049 bytes, checksum: d4c15dfc169c88003dd0c535089464ce (MD5) Made available in DSpace on 2011-07-11T17:00:40Z (GMT). No. of bitstreams: 1 1969_cook.pdf: 1829049 bytes, checksum: d4c15dfc169c88003dd0c535089464ce (MD5) Previous issue date: 1969 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-11T17:00:40Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:32:55-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis After reviewing the document, I've determined that the copyright protections for this work have expired and it is in the public domain due to a failure to comply with formalities. This review was done and the access restrictions lifted by astein@illinois.edu on 2022-01-12 Open Restriction set for Item 25931 on 2022-01-12T20:40:36Z with date null by astein@illinois.edu. Open 6072148 http://hdl.handle.net/2142/25758 en 1969 Dwight Dexter Cook fractionally charged particles terrestrial samples sea water rock quarks Search for fractionally charged particles in terrestrial samples Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.