| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
Neutron diffraction measurement of powder alpha-Fe sample was carried out at the high resolution powder diffractometer iMATERIA. The correlation effects among thermal displacements of atoms were estimated. The force constants among atoms were obtained using an equation for transforming of the correlation effects to force constants. The force constants and the crystal structure of Fe were used to estimate the phonon dispersion relations, phonon density of states, and specific heat by computer simulation. Neutron diffraction measurements were performed on powder Cu2O with different samples that are pressure released after a pressing force. Peak widths of Bragg lines increased depending on the pressing force. To clarify the relation between the crystallite size and the microstrain effect, Rietveld refinenement analysis was performed. The increasing peak width according to the dependence of pressing force is mainly derived from strain effects.
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