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| radiation length (of а relativistic particle, decrease of initial energy by a factor e); Heitler unit (especially in theory of electron-photon showers) | |||
| cascade unit; radiation unit | |||
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| radiation length (of а relativistic particle, decrease of initial energy by a factor e); Heitler unit (especially in theory of electron-photon showers) | |||
| cascade unit; radiation unit | |||