The Microscopic Mechanism of Compton Scattering of Some Saline Solutions

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Abstract:

Based on preliminary research results about Compton scattering of saline solution, a linear relationship between the scattered photon counts and the concentrations had been deduced for a certain solution and it had been found that the slope of the lines was decreasing with the atomic number of the cation increasing for LiC1, NaCl and KC1(the same result for MgC1BB2BB and BaC1BB2BB) solution. Now, in order to explain such rule of the slope, the microscopic mechanism of scatterers has been studied. Through the electronic structure of hydrated ions is analyzed in detail: the distance between hydration ion and O atom after optimized, the total energy of hydration ion, the equivalent charge distribution of hydration ion and the electronic density distribution of hydration ion. At last, it is concluded that the reason of the slope decreasing when the atomic number of the alkali cation for KC1, NaCl, LiCl solutions (or MgC1BB2BB and BaClBB2BB solutions) is the bounding strength of the system on its electrons become increasing, the probability of Compton scattering is decreasing, and it will constrain the increasing velocity of the scattered photon counts.

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Advanced Materials Research (Volumes 560-561)

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35-40

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August 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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[1] R Masuji, K Watanaben, A Yamazaki, A Uritani, A study on electron density imaging using the Compton scattered X-ray CT technique, Nucl. Instr. and Meth. A, 09(2010)106-110.

Google Scholar

[2] Harding G., Harding E., Compton scatter imaging: A tool for historical exploration, Applied Radiation and Isotopes, 68(2010) 993–1005.

DOI: 10.1016/j.apradiso.2010.01.035

Google Scholar

[3] J. Tickner, G. Roach, Characterisation of coal and minerals using Compton profile analysis. Nucl. Instr. Meth. Phys. Rese. Sect. B, 213 (2004) 507-510.

Google Scholar

[4] G. Luo, S.Q. Zhou, X.Q. Hu, The relationship between Compton scattered photon counts and Cu content in Cu-Ni and Fe-Cu alloys, Nucl. Elec. Dete. Tech., 30(2010)278-281. (in Chinese).

Google Scholar

[5] G. Luo, X.Q. Hu, Theoretical and experimental study on Compton scattering of a binary powder mixture, Journal of Chongqing University (English edition), 03(2010) 29-34.

Google Scholar

[6] G. Luo, S.Q. Zhou, Z. Han S.K. Chen, Relationship between scattered photon counts and concentrations of some saline solutions in Compton scattering, Chin. Jour. Chem., 02(2007) 164-167.

DOI: 10.1002/cjoc.200790033

Google Scholar

[7] G. Luo, S.Q. Zhou, Determination of concentration of solutions by the Compton scattering method, Physi. Test. Chem. Anal. Part B: Chemical Analysis, 1(2010)51-53.

Google Scholar

[8] R. W. Impey, P. A. Madden, I. R. McDonald, Hydration and mobility of ions in solution, , J. Phys. Chem., 87(1983) 5071-5083.

DOI: 10.1021/j150643a008

Google Scholar

[9] E.S. Boek, P.V. Coveney, N.T. Skipper, Monte Carlo molecular modelling studies of hydrated Li-smectites, Na-smectites, K-smectites – understanding the role of potassium as a clay swelling inhibitor, J. Am. Chem. Soc., 117(1995) 12608-12617.

DOI: 10.1021/ja00155a025

Google Scholar

[10] G. Palinkas, W.O. Riede, K.A. Heinzinger, A molecular dynamics study of aqueous solutions. VII. Improved simulation and comparison with X-Ray investigations of a NaCl solution, Z. Naturforsch. A, 32 (1977) 1137-1145.

DOI: 10.1515/zna-1977-1009

Google Scholar

[11] K. Sriprajak, K. Teerakiat, H. Supot, The hydration structure of 18-crown-6/K+ complex as studied by Monte Carlo simulation using ab initio fitted potential, Journal of Molecular Graphics and Modelling, 25(2006) 1, 55-60.

DOI: 10.1016/j.jmgm.2005.11.002

Google Scholar

[12] P. Hohenberg, W. Kohn, Inhomogeneous electron gas, Phys. Rev. B, 136(1964) 864-871.

Google Scholar

[13] W. Kohn, L. J. Sham, Self-consistent equations including exchange and correlation effects, Phys. Rev. A, 140(1965) 1133-1138.

DOI: 10.1103/physrev.140.a1133

Google Scholar

[14] M. Levy, Universal variational functionals of electron densities, first-order density matrices, and natural spin-orbitals and solution of the v-representability problem, Proc. Natl. Acad. Sci. U. S. A., 76(1979) 6062-6065.

DOI: 10.1073/pnas.76.12.6062

Google Scholar