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Light water is frequently used as a standard for calibrating small‐angle neutron scattering (SANS) data. The intensities collected for 1 and 2 mm of light water in standard quartz cells may differ by up to about 50% due to the presence of multiple and inelastic scattering [Rennie & Heenan (1993). Proceedings of ISSI Meeting, Dubna, pp. 254–260, Report E3‐93‐65; Teixeira (1992). Structure and Dynamics of Strongly Interacting Colloids and Supramolecular Aggregates in Solution, edited by S. H. Chen, pp. 625–658. Dordrecht: Kluwer Academic Publishers]. Multiple scattering increases with the thickness of the sample. The use of only elastically scattered neutrons may lead to an absolute intensity of the SANS data of about a factor of 2 higher than that obtained by taking into account all of the neutrons on the detector [Ghosh & Rennie (1990). Inst. Phys. Conf. Ser. 107 , 233–244]. However, it is shown here that the scattering intensities collected with different ratios of sample‐to‐beam dimension do present large differences as a function of sample thickness. In particular, ratios smaller and larger than unity are considered and the results are discussed and compared with Monte Carlo simulations. 相似文献
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Cooper Matthew W. Auer Matthias Bowyer Theodore W. Casey Leslie A. Elmgren Klas Ely James H. Foxe Michael P. Gheddou Abdelhakim Gohla Herbert Hayes James C. Johnson Christine M. Kalinowski Martin Klingberg Franziska J. Liu Boxue Mayer Michael F. McIntyre Justin I. Plenteda Romano Popov Vladimir Zahringer Matthias 《Journal of Radioanalytical and Nuclear Chemistry》2019,320(2):369-375
To obtain the relationship between radon solubility and temperature, salinity, and pH of radon-bearing water in in situ leaching uranium mines, an experimental device for measuring the radon solubility in water was designed and manufactured. According to the range of temperature range, salinity, and pH of radon-containing radioactive water from in situ leaching mines in China, aqueous radon solubilities at different temperatures and salinities were determined using an orthogonal design and, concurrently, radon solubilities at different pH also determined. An empirical equation for estimating the radon solubility in radioactive water containing radon in uranium mining and metallurgy is proposed.
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