Zobrazeno 1 - 10
of 50
pro vyhledávání: '"M. di Tada"'
Publikováno v:
Scopus-Elsevier
Long-lived cosmogenic radioisotopes, 10Be, 26Al, 36Cl, 41Ca and 59Ni, have been measured in five samples from the Campo del Cielo iron meteorite by accelerator mass spectrometry (AMS). The 36Cl activities were significantly above the background. For
Autor:
M. di Tada, Chris S. M. Turney, Michael I. Bird, Paul Hausladen, Guaciara M. Santos, L.K. Fifield
Publikováno v:
Radiocarbon. 43:1139-1145
Charcoal samples from ancient human occupation sites in Australia have been subjected to a rigorous pretreatment and stepped combustion regime in order to explore the possibility that these sites may be older than previous radiocarbon dating had sugg
Autor:
L. M. Di Tada, Pavel P. Povinec, Sang-Han Lee, Janine Gastaud, Paul Hausladen, Eric Wyse, L. Liong Wee Kwong, J. La Rosa, Guaciara M. Santos, L.K. Fifield
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 248:757-764
IAEA reference materials (radionuclides in the marine environment) collected in areas affected by nuclear reprocessing plants and nuclear weapons tests have been analysed by semiconductor alpha-spectrometry (SAS), liquid scintillation spectrometry (L
Autor:
R. G. Cresswell, Paul Hausladen, M. di Tada, Michael I. Bird, Christian Turney, Guaciara M. Santos, Z Youping, Arnold Peter Kershaw, L.K. Fifield
Publikováno v:
Radiocarbon. 43:45-54
Lynch's Crater in northeastern Australia provides a long, continuous record of environmental change within the Late Quaternary. Here, we present newly determined radiocarbon ages, using acid-base-acid stepped combustion (ABA-SC) and acid-base-wet oxi
Autor:
M. di Tada, R. G. Cresswell, Patrick Moss, Arnold Peter Kershaw, Y. Zhou, Paul Hausladen, Michael I. Bird, L.K. Fifield, Christian Turney, Guaciara M. Santos
Publikováno v:
Journal of Quaternary Science. 16:767-771
Lynch's Crater preserves a continuous, high-resolution record of environmental changes in north Queensland. This record suggests a marked increase in burning that appears to be independent of any known major climatic boundaries. This increase is acco
Autor:
R. G. Cresswell, Roberto Meigikos dos Anjos, Bruno Turcq, L.K. Fifield, P. R. S. Gomes, M. di Tada, A. Sifeddine, Renato Campello Cordeiro, Guaciara M. Santos
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 172:761-766
Soil samples were collected in tierra firme upland and lowland areas of the Km 41 reserve near Manaus (20°30′S and 60°W), in Central Brazilian Amazon, within a 1700 m transect, at eight different depth ranges, from surface to 100 cm. The highest
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 168:427-436
The measurement of low levels of 99Tc (T 1/2 =213 ka ) by accelerator mass spectrometry (AMS) is reported for the first time. Because there are no stable isotopes of technetium, the 99Tc content of a sample is determined from the ratio of 99Tc to a k
Autor:
K. Liu, S.J. King, R. G. Cresswell, L.K. Fifield, J.P. Day, M. di Tada, J.F. Popplewell, P. Ackrill
Publikováno v:
Journal of Inorganic Biochemistry. 69:177-180
Silicon is possibly important in human physiology in protecting against the toxic effects of aluminium, but the kinetics of uptake and excretion of silicic acid, the bioavailable form, are not well characterised. We have used 32Si as a tracer in a hu
Autor:
M. Ramírez, A. Etchegoyen, E. Achterberg, J. E. Testoni, D.E. Alvarez, D. Abriola, J. O. Fernández Niello, G. V. Martí, A.M.J. Ferrero, M. di Tada, A. J. Pacheco, O. A. Capurro
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 123:39-42
The accelerator mass spectrometry (AMS) program that is under development using the 20UD electrostatic accelerator TANDAR at Buenos Aires is presented. Tests and measurements in order to evaluate and to improve the accelerator performance are describ
Autor:
J. E. Testoni, M. di Tada, A. O. Macchiavelli, I. Urteaga, Salvador Gil, D. E. DiGregorio, D. Abriola, A. J. Pacheco, D. Tomasi, G. V. Martí, O. A. Capurro, J. O. Fernández Niello
Publikováno v:
Physical Review C. 55:766-774
We have measured the ratio of the yields for the metastable and ground states of {sup 119}Te produced in the fusion-evaporation reactions {sup 110}Pd({sup 12}C,3n) and {sup 115}In({sup 7}Li,3n) by off-line observation of delayed {gamma}-ray emission.