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A
.gov website belongs to an official
government organization in the United States.
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information only on official, secure websites.
| Shape of the source | Size of the source (mm) | Number of the center | Number of the source |
|---|---|---|---|
| Ellipsoid | Radius 0.5 | 439 | 1756 |
| Cylinder | Long axis 1; Short axis 0.6; Height 2 | 418 | 1672 |
| Cube | Length 2; Width 1; Height 1 | 393 | 1572 |
