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Precision mass measurements of some isotopes of tungsten and mercury for an adjustment to the mass table in the region A=184 to A=204

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dc.contributor.author Barillari, Domenico K. en_US
dc.date.accessioned 2007-05-18T12:16:23Z
dc.date.available 2007-05-18T12:16:23Z
dc.date.issued 1999-09-01T00:00:00Z en_US
dc.identifier.uri http://hdl.handle.net/1993/1668
dc.description.abstract This thesis concerns the precise re-measurement of mass value in the region of the mercury isotopes, such that important discrepancies in the high-mass end of the mass table could be resolved. 'Scope and contents'. Four mass spectroscopic doublets involving a comparison between 201Hg, 199Hg and 183W (and using a chlorocarbon reference) are reported from measurements made with the upgraded Manitoba 11 deflection instrument. The measurements address the problem of a mass table mis-adjustment in the region of the valley of B-stability between the tungsten group and the noble metals. The results, forming a well-closed loop of mass differences, support the earlier results of Kozier [Ko(1977)] regarding the (stable) mercury isotope masses and confirm an approximate 20 [mu]u discrepancy in the mass adjustment of Audi 'et al' [Au(1993)]. A local least-square re-adjustment conducted using these and existing mass table data suggests that the error originates with mass differences pertaining to one or more other nuclide pairs, perhaps 193Ir-192Ir. The work on upgrading the precision voltage supply and potentiometry system of the Manitoba II instrument is also reported, as is a new assessment on the data processing method. (Abstract shortened by UMI.) en_US
dc.format.extent 8210156 bytes
dc.format.extent 184 bytes
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.language en en_US
dc.language.iso en_US
dc.rights info:eu-repo/semantics/openAccess
dc.title Precision mass measurements of some isotopes of tungsten and mercury for an adjustment to the mass table in the region A=184 to A=204 en_US
dc.type info:eu-repo/semantics/doctoralThesis
dc.degree.discipline Physics & Astronomy en_US
dc.degree.level Doctor of Philosophy (Ph.D.) en_US


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