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Satterthwaite, C.B. Toepke, Ival Lee 2012-04-05T21:30:25Z 2012-04-05T21:30:25Z 10000-01-01 1971 Motivated by the possibility that a metallic hydride with a high hydrogen to metal atom ratio would be superconducting» we have tested the superconductivity of thorium hydrides and found that Th4 H15 is a superconductor with a transition temperature near 8K, Measurements of the diamagnetic susceptibility of 24 thorium hydride and thorium deuteride samples of various compositions have been made to determine the effect of composition and of hydrogen isotope on the superconducting transition temperature, The transition temperatures ranged from 6,8 to 8,4K for samples with hydrogen compositions greater than the dihydrides~ while the transition temperatures are less than l,lK for the dihydtide and dideuteride samples, No hydrogen isotope effect was found outside the 5% uncertainty in transition temperature, The specific heat of Th4 H15 has been measured in order to determine a jump in the heat capacity that is characteristic of bulk superconductivity, No discontinuous change in the specific heat was found indicating that the transition temperature was smeared out or that the superconductivity is not characteristic of the bulk material, The effect of heat treatment was also studied, Submitted by William Weathers (weathrs2@illinois.edu) on 2012-04-05T21:30:25Z No. of bitstreams: 1 1971_toepke.pdf: 2754461 bytes, checksum: 9fb25bfd10d196b14e42358435628dfe (MD5) Made available in DSpace on 2012-04-05T21:30:25Z (GMT). No. of bitstreams: 1 1971_toepke.pdf: 2754461 bytes, checksum: 9fb25bfd10d196b14e42358435628dfe (MD5) Previous issue date: 1971 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by William Weathers (weathrs2@illinois.edu) on 2012-04-05T21:30:25Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:10:15-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only http://hdl.handle.net/2142/30474 2738554 en ©1971 Toepke superconductivity thorium hydrides thorium deuterides Superconductivity of thorium hydrides and thorium deuterides Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.