| 摘要 |
A circular calculator for the solution of radiation penetration problems, the parameters of which are: source indensity I, exposure time T, thickness L of a shield, source-target distance K and one of the radiation dose R at the target position and a quantity related to the radiation effect X on the target, comprising three concentric disks of different radii movable relatively to one another around an axis, two of which disks have each of two scales in opposition associated with the first four parameters I, T, L, K, the third disk having a scale associated with one of the two remaining parameters R and X and carrying an indicator of the R scale. |
