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THE ISOTOPIC ABUNDANCE OF CESIUM IN TRINITITE: IMPLICATIONS FOR POST-DETONATION ANALYSIS OF NUCLEAR MATERIALS

dc.contributor.advisorMcDonough, William Fen_US
dc.contributor.authorBorg, Dana Tamaraen_US
dc.date.accessioned2013-10-03T05:32:56Z
dc.date.available2013-10-03T05:32:56Z
dc.date.issued2013en_US
dc.identifier.urihttp://hdl.handle.net/1903/14506
dc.description.abstractCurrently, there are few studies of post-detonation materials due to their extremely complex nature. The cesium isotopic composition of trinitite, the product of the first nuclear detonation, was determined using multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) to evaluate the relationship between the time since the detonation of nuclear materials and their cumulative fission yields. The ratio of <super>137</super>Cs/<super>135</super>Cs in trinitite was found on average to be 0.31&plusmn;0.06, with abundances of <super>137</super>Cs (t<sub>1/2</sub>=30.07a) and <super>135</super>Cs (t<sub>1/2</sub>=2.3x106a) equal to 21.8&plusmn;0.6pg/g and 68&plusmn;12pg/g, respectively. These values result in an under-calculation of the amount of time that has passed since detonation. It is recommended that an initial <super>137</super>Cs/<super>135</super>Cs ratio of 1.5&plusmn;0.3 be used, instead of the proportion that they are produced during fission of 239Pu 0.87&plusmn;0.02, due to the fractionation of <super>137</super>Cs and <super>135</super>Cs before their deposition in trinitite due to the approximately 200 times longer cumulative half-life of the precursors to <super>135</super>Cs.en_US
dc.titleTHE ISOTOPIC ABUNDANCE OF CESIUM IN TRINITITE: IMPLICATIONS FOR POST-DETONATION ANALYSIS OF NUCLEAR MATERIALSen_US
dc.typeThesisen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentGeologyen_US
dc.subject.pqcontrolledGeochemistryen_US
dc.subject.pquncontrolledcesiumen_US
dc.subject.pquncontrollednuclearen_US
dc.subject.pquncontrolledradiogenicen_US
dc.subject.pquncontrolledtrinititeen_US


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