Search Results - (Author, Cooperation:R. C. Finkel)
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1Latest Papers from Table of Contents or Articles in PressN. E. Young ; J. P. Briner ; D. H. Rood ; R. C. Finkel
American Association for the Advancement of Science (AAAS)
Published 2012Staff ViewPublication Date: 2012-09-18Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Arctic Regions ; Canada ; *Climate Change ; *Ice Cover ; SeasonsPublished by: -
2Latest Papers from Table of Contents or Articles in PressJ. S. Johnson ; M. J. Bentley ; J. A. Smith ; R. C. Finkel ; D. H. Rood ; K. Gohl ; G. Balco ; R. D. Larter ; J. M. Schaefer
American Association for the Advancement of Science (AAAS)
Published 2014Staff ViewPublication Date: 2014-02-22Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Beryllium/analysis ; *Ice Cover ; *Islands ; Motion ; Radioisotopes/analysisPublished by: -
3Articles: DFG German National LicensesStaff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] The 230Th-238U disequilibrium system is a useful tool for studying sources and processes involved in recent volcanism because it can provide a direct measure of an important geochemical characteristic of the source, the Th/U ratio7,10. Unlike other isotopic tracers such as 87Sr/86Sr, 143Nd/144Nd, ...Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesElmore, D. ; Gove, H. E. ; Ferraro, R. ; Kilius, L. R. ; Lee, H. W. ; Chang, K. H. ; Beukens, R. P. ; Litherland, A. E. ; Russo, C. J. ; Purser, K. H. ; Murrell, M. T. ; Finkel, R. C.
[s.l.] : Nature Publishing Group
Published 1980Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Because of its long half life, 129I measurement by counting its β decay is not very sensitive and is useful only for samples with high activity7. Although our mass spectrometry measurements of 129I are the first to use an accelerator, McHugh and Sheffield8 used a three stage mass spectrometer with ...Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesBerger, W. H. ; Finkel, R. C. ; Killingley, J. S. ; Marchig, V.
[s.l.] : Nature Publishing Group
Published 1983Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] We analysed five box cores (PLDS 66, 68, 70, 72 and 74) all from water depths near 4,000 m close to the Equator, and from between 100 W and 115W; Core PLDS 72 may be taken as typical. Carbonate percentages, physical properties, and diatom stratigraphy have already been published for this core5'7. ...Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesNeftel, A. ; Beer, J. ; Oeschger, H. ; Zürcher, F. ; Finkel, R. C.
[s.l.] : Nature Publishing Group
Published 1985Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] In 1980 a shallow electromechanically drilled core was collected near Dye 3 (6511'N, 4330'W) in the frame of the US-Danish-Swiss Greenland Ice Sheet Program. The main purpose of this core was to provide samples for studying the influence of the 11-yr solar cycle on the iaBe concentration in the ...Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesBeer, J. ; Blinov, A. ; Bonani, G. ; Finkel, R. C. ; Hofmann, H. J. ; Lehmann, B. ; Oeschger, H. ; Sigg, A. ; Schwander, J. ; Staffelbach, T. ; Stauffer, B. ; Suter, M. ; Wötfli, W.
[s.l.] : Nature Publishing Group
Published 1990Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] The solar activity, expressed as the sunspot number, has been recorded consistently since 1843, when Schwabe discovered the 11 -yr cycle. Earlier data can be reconstructed from historical documents3"5 containing references to auroral events as well as mentioning sunspot activity. Although much ...Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesBerger, W. H. ; Finkel, R. C. ; Killingley, J. S. ; Marchig, V.
[s.l.] : Nature Publishing Group
Published 1983Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] We analysed five box cores (PLDS 66, 68, 70, 72 and 74) all from water depths near 4,000 m close to the Equator, and from between 100 W and 115W; Core PLDS 72 may be taken as typical. Carbonate percentages, physical properties, and diatom stratigraphy have already been published for this core5'7. ...Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesMcAninch, J. E. ; Marchetti, A. A. ; Bergquist, B. A. ; Stoyer, N. J. ; Nimz, G. J. ; Caffee, M. W. ; Finkel, R. C. ; Moody, K. J. ; Sideras-Haddad, E. ; Buchholz, B. A. ; Esser, B. K. ; Proctor, I. D.
Springer
Published 1998Staff ViewISSN: 1588-2780Source: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyEnergy, Environment Protection, Nuclear Power EngineeringNotes: Abstract Accelerator mass spectrometry (AMS) is an established technique for the detection of long-lived radionuclides at environmental levels. At LLNL, planned facility upgrades and advances in detection techniques are allowing us to explore the applicability of AMS to isotopes not previously pursued. One such isotope is99Tc. We have performed a number of preliminary tests to examine the technical feasibility of AMS for the detection of99Tc. The questions addressed were negative ion production in the cesium sputter source, transport efficiency for the ions through the spectrometer, and detection efficiency for99Tc ions after the spectrometer. Based on the positive results of these tests, we have begun to develo measurement protocol.Type of Medium: Electronic ResourceURL: