نتایج جستجو برای: fission track

تعداد نتایج: 78046  

Journal: :The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists 1973

Journal: :Geochronology 2022

Abstract. The tools for interpreting fission-track data are evolving apace, but, even so, the outcomes cannot be better than data. Recent studies showed that track etching and observation affect confined-track length measurements. We investigated effects of grain orientation, polishing, on counts in apatite. Our findings throw light phenomena hence sample ages, whilst raising question: what as ...

2012
S P Tripathy Dimple Verma C Sunil G Haridas P K Sarkar

This paper reports the measurement of high energy neutron component (E > 50 MeV) carried out at the Indus-1 (450 MeV) and Indus-2 (2.5 GeV) electron accelerators (RRCAT, Indore, India). The study is based on the registration of neutron induced fission fragments from bismuth radiators in the adjoint solid polymeric track detectors. These bismuth fission detector (BFD) stacks are exposed at the i...

2004
J. K. Hourigan P. W. Reiners

The isotopic thermochronological study included the U–Pb (SHRIMP) and fission-track dating of zircon and fission-track and (U–Th)–He dating of apatite from syenite intrusions cropping out in the eastern slope of the Sredinnyi Range of Kamchatka. The emplacement time of the intrusion was determined, and its exhumation velocity was evaluated. According to U–Pb (SHRIMP) zircon dating, the age of s...

Journal: :The Journal of the Geological Society of Japan 1990

Journal: :Environmental Health Perspectives 1992
K J Morris C L Barker A L Batchelor P Khanna

Twenty-four Fischer 344 rats were exposed to enriched uranium dioxide (UO2) aerosols to give a mean initial lung burden of 291 +/- 89 (SD) micrograms. Groups of rats were killed at 1, 7, 180, 360, 540, and 720 days post-inhalation (PI). Their lungs were fixed and inflated. Sections cut from all five lung lobes were used to prepare CR-39 neutron-induced 235U fission fragment autoradiographs. A s...

2010
Ron Harris James Kaiser Anthony Hurford Andy Carter

Paleotemperature indicators and apatite fission track analysis of Australian continental margin cover sequeRces accreted to the active Banda arc-continent collision indicate little to no heating during rapid late Neogene uplift and exhumation. Thermal maturation patterns of vitrinite reflectance, conodont alteration and' illite crystallinity show that peak paleotemperatures (PPT) increase with ...

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