Reduction of Delayed-Neutron Contribution to Variance-to-Mean Ratio by Application of Difference Filter Technique
| Autor: | Kengo Hashimoto, Tomoaki Mouri, Nobuo Ohtani |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Nuclear and High Energy Physics
Chemistry Astrophysics::High Energy Astrophysical Phenomena Computational physics Nuclear physics Reduction (complexity) symbols.namesake Nuclear Energy and Engineering Neutron flux Range (statistics) symbols Feynman diagram Neutron Index of dispersion Exponential decay Delayed neutron |
| Zdroj: | Journal of Nuclear Science and Technology. 36:555-559 |
| ISSN: | 1881-1248 0022-3131 |
| DOI: | 10.1080/18811248.1999.9726238 |
| Popis: | The difference-filtering correlation analysis was applied to time-sequence neutron count data measured in a slightly subcritical assembly, where the Feynman-α analysis suffered from large contribution of delayed neutron to the variance-to-mean ratio of counts. The prompt-neutron decay constant inferred from the present filtering analysis agreed very closely with that by pulsed neutron experiment, and no dependence on the gate-time range specified could be observed. The 1st-order filtering was sufficient for the reduction of the delayed-neutron contribution. While the conventional method requires a choice of analysis formula appropriate to a gate-time range, the present method is applicable to a wide variety of gate-time ranges. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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