## Gamma-ray transmisson through finite slabs |

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### Contents

Nkex for lead slabs | 9 |

Ekaex for lead slabs | 19 |

Ena for iron slabs | 25 |

23 other sections not shown

### Common terms and phrases

absorption by pair accuracy angle atomic number average slope backward scattering build-up factors calculated cent cosine decreases density in scattered density totaled distribution normalized elemental slab energy density energy of incident energy/mc2 Fig error estimates exactly k collisions expected energy forward scattering free paths a0 function gamma-ray incident distribution incident energy incident path incident photon increases infinite homogeneous medium lead and iron LEAD IRON mean free paths mfp Fig normalized by dividing number of photons pair production photoelectric absorption photoelectric effect photon in units PHOTONS OF 0.2 photons scattered photons transmitted plane source point source probability of transmission pure Compton scatterer scattered photons slab in mfp slab normal slab thickness slob source of unit Table thick slabs thickness in mean thickness of slab thin slabs thin-slab method total absorption coefficient total transmission TRANSMISSION AND REFLECTION transmitted photons transmitted with exactly unit strength units of mc2 vergence zero