Retention of chlorine-36 by a cementitious backfill
نویسندگان
چکیده
منابع مشابه
Chlorine-36 as a tracer of perchlorate origin.
Perchlorate (ClO4(-)) is ubiquitous in the environment. It is produced naturally by atmospheric photochemical reactions, and also is synthesized in large quantities for military, aerospace, and industrial applications. Nitrate-enriched salt deposits of the Atacama Desert (Chile) contain high concentrations of natural ClO4(-), and have been exported worldwide since the mid-1800s for use in agric...
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Considered as one of the most available radionuclide in soil-plant system, ³⁶Cl is of potential concern for long-term management of radioactive wastes, due to its high mobility and its long half-life. To evaluate the risk of dispersion and accumulation of ³⁶Cl in the biosphere as a consequence of a potential contamination, there is a need for an appropriate understanding of the chlorine cycling...
متن کاملSearch for Extinct Chlorine-36 in an Allende Cai
Introduction: The search for the former existence in the Early Solar System of the now extinct radionuclide Cl (T1⁄2 = 3x10 a) has proven to be difficult [e.g., 1]. This is at least partly due to the volatility of chlorine and the fact that in primitive meteorites Cl occurs in high abundance only in alteration phases such as sodalite (Na8Al6Si6O24Cl2). 36-Cl decays to both Ar by β decay (98.1 %...
متن کاملCosmogenic chlorine-36 production rates in terrestrial rocks
Chlorine-36 is produced in rocks exposed to cosmic rays at the earth surface through thermal neutron activation of 35C1, spallation of 39K and 't°Ca, and slow negative muon capture by 4°Ca. We have measured the 36C1 content of 14C-dated glacial boulders from the White Mountains in eastern California and in a 14C-dated basalt flow from Utah. Effective, time-integrated production parameters were ...
متن کاملArgon-36 from Neutron Capture on Chlorine in Nature
Argon analysis on samples of sodalite from Dungannon, Ontario reveals an excess of 36Ar from neutron capture on 35C1 and excess 40Ar from the decay of 40K. These results indicate an average production rate of 5.6 X 102 atoms of 3®C1 per year per gram of chlorine over the age of the mineral. 3 .9X 108 yrs. The surface residence time of chlorine-rich rocks may be determined from the amounts of 36...
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ژورنال
عنوان ژورنال: Mineralogical Magazine
سال: 2015
ISSN: 0026-461X,1471-8022
DOI: 10.1180/minmag.2015.079.6.05