## The thermal neutron reactor as an instrument for measuring neutron cross sections |

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### Contents

Abstract | 6 |

Classification of Effects | 12 |

Dynamics of Reactor Flux Variations | 36 |

3 other sections not shown

### Common terms and phrases

a l/v absorber absorption cross section absorption effect air gap aluminum analysis atom barns bismuth boron cadmium cut-off cadmium sleeve cadmium tube calculated calibration capture cross section circuit coefficients component constant control rod corrected curve decrease delayed neutron delayed neutron parent drift elastic collisions epicadmium error factor fast fission fast neutrons Figure foil fraction galvanometer give graph graphite heavy water Hence impurities increase indium inelastic scattering ionization chamber leakage manganese measured effect neutron capture neutron density neutron energy neutron flux observed obtained ohms operated oscillating method Oscillating Sample period perturbation power level reactor flux resonance absorption resonance capture resonance escape resonance integral resonance region rest position sample container sample position scattering cross section scattering effect sensitivity slowing-down effect spectrum statistical weight subtracted term thermal absorption thermal capture thermal cross section thermal neutron thickness thimble total ion current uranium variation zero