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| radiation length | |||
| radiation length (of а relativistic particle, decrease of initial energy by a factor e); cascade unit; radiation unit; Heitler unit (especially in theory of electron-photon showers) | |||
| longueur de rayonnement: 22 phrases in 4 subjects |
| Antennas and waveguides | 1 |
| Earth sciences | 14 |
| Environment | 1 |
| Радиоактивное излучение | 6 |