Abstract
This work analyzed the gamma ray attenuation effect from the self-absorption and shield attenuation perspectively. An exact mathematical equation was given for the geometric factor of the cylindrical fissile material with dual shields. In addition, several approximation approaches suitable for real situation were discussed, especially in the radial and axial directions of the cylinders, since the G-factors have simple forms. Then the space distribution patterns of the G-factor were analyzed based on numerical result and effective ways to solve the geometric information of the cylindrical fissile material, the radii and the heights, were deduced. This method was checked and verified by numerical calculation. Because of the efficiency of the method, it is ideal for application in real situations, such as nuclear safeguards, which demands speed of detection and accuracy of geometric analysis.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 266-272 |
| Number of pages | 7 |
| Journal | Nuclear Science and Techniques/Hewuli |
| Volume | 16 |
| Issue number | 5 |
| State | Published - Oct 2005 |
| Externally published | Yes |
Keywords
- Dual shields
- Fissile material
- Gamma ray self-absorption
- Isotopic composition