Energy Absorption Buildup Factors and Energy Conservation
| Autor: | Thomas J. Overcamp |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Nuclear and High Energy Physics
Photon Chemistry Point source Attenuation Physics::Medical Physics chemistry.chemical_element Uranium Method of moments (statistics) Energy conservation Nuclear Energy and Engineering Computer Science::Mathematical Software Curve fitting Deposition (phase transition) Atomic physics |
| Zdroj: | Journal of Nuclear Science and Technology. 46:479-483 |
| ISSN: | 1881-1248 0022-3131 |
| DOI: | 10.1080/18811248.2007.9711555 |
| Popis: | The ANSI/ANS energy absorption buildup factors (ANSI/ANS-6.4.3–1991) were used to determine if they conserve absorbed energy from a point source of monoenergetic photons in an infinite, absorbing medium. Air, water, concrete, iron, lead, and uranium were considered for photon energies ranging from 0.015 to 15 MeV. The primary calculations were based on fitting natural cubic splines to the energy absorption buildup factors and analytical integration of the energy absorbed using the cubic spline curve fit. This method was supplemented by linear spline interpolation. For air, water, concrete, and iron, the ANSI/ANS energy absorption buildup factors were determined using the method of moments with theenergy attenuation and deposition coefficients of Hubbell (NSRDS-NBS 29). The results of this study essentially confirmed energy conservation for these four materials using the energy attenuation and deposition coefficients of Hubbell. For lead and uranium, the ANSI/ANS energy absorption buildup factors were dete... |
| Databáze: | OpenAIRE |
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