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| 中性子放射化分析× | 中性子輸送計算× | |
|---|---|---|
| 分野 | 原子核物理学 | 原子核物理学 |
| 系統 | Process / pipeline | Process / pipeline |
| 提唱年≠ | 1936 | 1942 |
| 提唱者≠ | George de Hevesy, Hilde Levi | Enrico Fermi, Leslie Szilard |
| 種類≠ | analytical measurement technique | computational simulation pipeline |
| 原典≠ | Chadwick, J. (1932). Possible Existence of a Neutron. Nature, 129(3252), 312. DOI ↗ | Duderstadt, J. J., & Hamilton, L. J. (1976). Nuclear Reactor Analysis. John Wiley & Sons. link ↗ |
| 別名 | NAA, activation analysis, trace element analysis | neutron diffusion, neutron migration, transport equation solution |
| 関連 | 5 | 5 |
| 概要≠ | Neutron activation analysis (NAA) is an analytical technique for determining elemental composition by bombarding samples with neutrons to produce radioactive isotopes, invented by de Hevesy and Levi in 1936. By measuring decay gamma rays from irradiated samples, NAA quantifies trace and major elements with high sensitivity, specificity, and accuracy without requiring destructive dissolution or complex sample preparation. | Neutron transport calculation is a computational method for determining the distribution and behavior of neutrons in a nuclear medium, developed during the Manhattan Project in the 1940s. It solves the Boltzmann transport equation to predict neutron flux, energy spectra, and reaction rates essential for reactor design and shielding analysis. |
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