caa a22 4500 37894133X CHVBK 20180305123653.0 cr unu---uuuuu 161128e20040201xx s 000 0 eng 10.1524/ract.92.2.89.27461 doi (NATIONALLICENCE)gruyter-10.1524/ract.92.2.89.27461 Field study of the migration of 90Sr, 237Np, 238Pu and 241Am in unsaturated Chinese loess under artificial rainfall condition [Elektronische Daten] [S. S. Li, C. L. Liu, Y. J. Zhao, Q. H. Wu, Z. M. Wang, S. W. Ji] The migration of 90Sr, 237Np, 238Pu and 241Am in unsaturated Chinese loess under artificial rainfall condition was investigated at the CIRP´s field test site. Quartz containing 90Sr, 237Np, 238Pu and 241Am was introduced into an experimental pit and the pit was backfilled. Artificial rainfall of 10-15 mm/d was applied to the experimental pit for 1078 days. HTO was used for obtaining the migration rate of moisture water in the pit. Vertical core soil samples were taken twice a year and cut into 0.5cm long section soil samples. The section soil samples were weighed and wind dried. Radioactivity of 237Np and 241Am in the section soil samples was measured with a low energy photon detector (HPGe); 90Sr and 238Pu were determined with a low background α & β detector after chemical separation. During the experiment, moisture water at different depths was taken on a daily basis and 3H in the moisture water samples was determined with liquid scintillation technique. Experimental result indicates that the downward migration rate of moisture water was 2.27 cm/d and the retardation factors of 90Sr, 237Np, 238Pu and 241Am in the loess unsaturated zone were 9.9 × 102, 3.2 × 103, 3.2 × 103 and 4.5 × 103, respectively. This result suggests that 90Sr, 237Np, 238Pu and 241Am could be effectively retarded by the loess unsaturated zone. © 2004 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Li S. S. aut Liu C. L. aut Zhao Y. J. aut Wu Q. H. aut Wang Z. M. aut Ji S. W. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/2/2004(2004-02-01), 89-94 0033-8230 92:2/2004<89 2004 92 ract https://doi.org/10.1524/ract.92.2.89.27461 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.92.2.89.27461 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li S. S. aut NATIONALLICENCE 700 1- Liu C. L. aut NATIONALLICENCE 700 1- Zhao Y. J. aut NATIONALLICENCE 700 1- Wu Q. H. aut NATIONALLICENCE 700 1- Wang Z. M. aut NATIONALLICENCE 700 1- Ji S. W. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/2/2004(2004-02-01), 89-94 0033-8230 92:2/2004<89 2004 92 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter