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
| 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.degree.discipline | Physics and Astronomy | en_US |
| dc.degree.level | Doctor of Philosophy (Ph.D.) | en_US |
| 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.identifier.uri | http://hdl.handle.net/1993/1668 | |
| dc.language.iso | eng | en_US |
| dc.rights | open access | en_US |
| 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 | doctoral thesis | en_US |