研究目的
To determine the total electronic cross-section, total atomic cross-section, effective atomic number, and effective electron density for Sm2O3, SmI2, and SmCl3 compounds experimentally and theoretically.
研究成果
The study successfully determined the mass attenuation coefficients, effective atomic numbers, and electron densities for Sm2O3, SmI2, and SmCl3 compounds. The results indicate that these parameters depend on the chemical environment, photon energy, and absorption edge. The findings are significant for applications in radiation shielding and medical imaging.
研究不足
The study is limited to the measurement of effective atomic numbers and electron densities for Sm compounds at a single photon energy of 59.543 keV. The comparison between experimental and theoretical values shows discrepancies for SmCl3 and SmI2, possibly due to differences in chemical bonding and electron affinity.
1：Experimental Design and Method Selection:
The mass attenuation coefficients and K X-rays the total absorption atomic cross section factors were determined by using transmission geometry. A Si(Li) detector with multi-channel analyzer was used for detection of X-rays.
2：Sample Selection and Data Sources:
Powdered samples of Sm2O3, SmI2, and SmCl3 were prepared by supporting them on Mylar film at specific mass thicknesses.
3：List of Experimental Equipment and Materials:
A Si(Li) detector system with a resolution of 155 eV at
4：9 keV, a 75 mCi 241Am radiative source, and Mylar film were used. Experimental Procedures and Operational Workflow:
The target samples were excited by using
5：543 keV photons from the 241Am source, and X-rays emitted from samples were detected by the Si(Li) detector system. Data Analysis Methods:
The net counts with and without absorber were obtained for the same time duration and under the same experimental conditions to calculate the mass attenuation coefficients.
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