Zobrazeno 1 - 10
of 121
pro vyhledávání: '"Sturchio N"'
Autor:
Lu, Z. -T., Schlosser, P., Smethie Jr., W. M., Sturchio, N. C., Fischer, T. P., Kennedy, B. M., Purtschert, R., Severinghaus, J. P., Solomon, D. K., Tanhua, T., Yokochi, R.
The noble gas radionuclides, including 81Kr (half-life = 229,000 yr), 85Kr (11 yr), and 39Ar (269 yr), possess nearly ideal chemical and physical properties for studies of earth and environmental processes. Recent advances in Atom Trap Trace Analysis
Externí odkaz:
http://arxiv.org/abs/1305.4608
Autor:
Jiang, W., Williams, W. D., Bailey, K., Davis, A. M., Hu, S. -M., Lu, Z. -T., O'Connor, T. P., Purtschert, R., Sturchio, N. C., Sun, Y. R., Mueller, P.
Publikováno v:
Phys. Rev. Lett. 106:103001,2011
Atom Trap Trace Analysis (ATTA), a laser-based atom counting method, has been applied to analyze atmospheric Ar-39 (half-life = 269 yr), a cosmogenic isotope with an isotopic abundance of 8x10^-16. In addition to the superior selectivity demonstrated
Externí odkaz:
http://arxiv.org/abs/1101.2933
Autor:
Sturchio, N. C., Du, X., Purtschert, R., Lehmann, B. E., Sultan, M., Patterson, L. J., Lu, Z. -T., Mueller, P., Bigler, T., Bailey, K., O'Connor, T. P., Young, L., Lorenzo, R., Becker, R., Alfy, Z. El, Kaliouby, B. El, Dawood, Y., Abdallah, A. M. A.
Measurements of 81Kr/Kr in deep groundwater from the Nubian Aquifer (Egypt) were performed by a new laser-based atom-counting method. 81Kr ages range from \~2x10^5 to ~1x10^6 yr, correlate with 36Cl/Cl ratios, and are consistent with lateral flow of
Externí odkaz:
http://arxiv.org/abs/physics/0402092
Autor:
Wang, L. -B., Mueller, P., Holt, R. J., Lu, Z. -T., O'Connor, T. P., Sano, Y., Sturchio, N. C.
Publikováno v:
Geophysical Research Letters 30, 1592 (2003)
A sensitive laser spectroscopic method has been applied to the quantitative determination of the isotope ratio of helium at the level of 3He/4He = 10^-7 - 10^-5. The resonant absorption of 1083 nm laser light by the metastable 3He atoms in a discharg
Externí odkaz:
http://arxiv.org/abs/physics/0311121
Autor:
Du, X., Purtschert, R., Bailey, K., Lehmann, B. E., Lorenzo, R., Lu, Z. -T., Mueller, P., O'Connor, T. P., Sturchio, N. C., Young, L.
We demonstrate a new method for determining the 81Kr/Kr ratio in environmental samples based upon two measurements: the 85Kr/81Kr ratio measured by Atom Trap Trace Analysis (ATTA) and the 85Kr/Kr ratio measured by Low-Level Counting (LLC). This metho
Externí odkaz:
http://arxiv.org/abs/physics/0311118
Akademický článek
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Publikováno v:
Science, 1998 Aug . 281(5379), 971-973.
Externí odkaz:
https://www.jstor.org/stable/2896117
Autor:
Sultan, M., Metwally, S., Milewski, A., Becker, D., Ahmed, M., Sauck, W., Soliman, F., Sturchio, N., Yan, E., Rashed, M., Wagdy, A., Becker, R., Welton, B.
Publikováno v:
In Journal of Hydrology 2011 403(1):14-24
Publikováno v:
In Journal of Hydrology 1 July 2008 356(1-2):70-83
Autor:
DeFranco, K. C. (Karyn C.), Ricketts, M. P. (Michael P.), Blanc-Betes, E. (Elena), Welker, J. M. (Jeffrey M.), Gonzalez-Meler, M. A. (Miquel A.), Sturchio, N. C. (Neil C.)
The net change in the carbon inventory of arctic tundra remains uncertain as global warming leads to shifts in arctic water and carbon cycles. To better understand the response of arctic tundra carbon to changes in winter precipitation amount, we inv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2423::0df890b4f34f48f163e8dda3e96ca8d7
http://urn.fi/urn:nbn:fi-fe2020120499459
http://urn.fi/urn:nbn:fi-fe2020120499459