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| longueur de rayonnement (especially in theory of electron-photon showers); unité de cascade (especially in theory of electron-photon showers); unité de Heitler (especially in theory of electron-photon showers); unité de rayonnement (especially in theory of electron-photon showers); unité de radiation (especially in theory of electron-photon showers); parcours d'absorption unitaire (especially in theory of electron-photon showers) | |||