## Proceedings of the International School of Physics "Enrico Fermi.", Volume 11N. Zanichelli, 1960 - Nuclear physics |

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Page 5

The Lüders theorem states that S

locality of the coupling . Hence , if the latter conditions are $ 1 . satisfied , one has

always

The Lüders theorem states that S

**invariance**is implied by Lorentz**invariance**andlocality of the coupling . Hence , if the latter conditions are $ 1 . satisfied , one has

always

**invariance**for combined space reflection , time reversal and ...Page 25

Consequences of

A theorem due to KRAMERS ( * * ) states that in a theory which is

time reversal all stationary Fermi states are ( at least twice ) degenerate .

Consequences of

**Invariance**under Time Reversal . 1 . - Kramers ' degeneracy .A theorem due to KRAMERS ( * * ) states that in a theory which is

**invariant**undertime reversal all stationary Fermi states are ( at least twice ) degenerate .

Page 32

From the spins and momenta characteristic for the preparation of the initial

ensemble and for the observation of the decay products one forms a rotationally

according ...

From the spins and momenta characteristic for the preparation of the initial

ensemble and for the observation of the decay products one forms a rotationally

**invariant**quantity . If this quantity changes sign under time reversal ( which ,according ...

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### Contents

GENERALITÀ | 1 |

PARTE PRIMA Problemi teorici | 9 |

PARTE SECONDA Correlazioni angolari polarizzazioni e decadimenti beta | 251 |

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### Common terms and phrases

allowed angle angular assumed calculated charge classical combination completely component connection conservation consider constant contribute correlation corresponding coupling curvature decay defined density dependence derived described determination direction discussed effects electric electromagnetic field electron element elementary emission energy equations example existence experiment experimental expression factor Fermi field final finds formula function geometrodynamics geometry give given gravitational histories initial interaction invariance known leads limit magnetic mass matrix means measured metric modes momentum neutrino neutron nuclei observed obtained operators pairs parity particle phase Phys physics polarization possible present principle problem properties purely quantity quantum quantum mechanics question radiation ratio reason reference relation relativity respect result scattering shown shows solution space spin spinor symmetry Table theory transformation transition universe vector wave weak zero