## Proceedings of the International School of Physics "Enrico Fermi.", Volume 72N. Zanichelli, 1979 - Nuclear physics |

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Page 5

Its probability of occurrence is proportional to the radiation density q(v) at the

frequency of the

the first process, the Ausstrah- lung, the transition is not excited externally.

Its probability of occurrence is proportional to the radiation density q(v) at the

frequency of the

**emitted**photon: where v = (Em — E„)jh and B"m is a constant. Inthe first process, the Ausstrah- lung, the transition is not excited externally.

Page 15

... but is treated in detail in section 75 (pages 186-191) of his 1913 book [52],

where he underlines: « It is important to settle whether the

particles follows a simple probability law, i.e. whether the alpha-particles are

... but is treated in detail in section 75 (pages 186-191) of his 1913 book [52],

where he underlines: « It is important to settle whether the

**emission**of alpha-particles follows a simple probability law, i.e. whether the alpha-particles are

**emitted**at ...Page 20

The alpha-particles

one half this energy (4.049 MeV). Thus, it appeared that during the

process the alpha- particles had to pass through a region of negative kinetic

energy ...

The alpha-particles

**emitted**by the decay of the same nucleus have only aboutone half this energy (4.049 MeV). Thus, it appeared that during the

**emission**process the alpha- particles had to pass through a region of negative kinetic

energy ...

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### Contents

E Amaldi Radioactivity a pragmatic pillar of probabilistic | 1 |

Statistical fluctuations | 10 |

Final remarks | 21 |

Copyright | |

24 other sections not shown

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3-geometry algebra applied assertion atoms axioms Boolean Borel field Borel sets calculus concept conditional probability conditionalization consider corresponding countable course defined definition denote derived deterministic dialog dialog-game disjoint dynamics edited Einstein elements equation equivalent exists experiment finite formal function geometry given Gleason's theorem Hence Hilbert space implies induction initial interaction interpretation irreversible Journ linear magnitude Math mathematical means Neumann non-Boolean notion observable orthogonal orthomodular lattice particle photon Phys physical quantity physical system physical theories physicists positive precision probabilistic probability measure probability space probability theory problem procedure quantum logic quantum mechanics quantum theory quantum-logical question radioactive random variable real numbers relation relative frequency relf represented respect result rule sequence space-time special relativity spin statistical operator subset subspace superspace theorem tion transformation truth universal constants vector velocity von Neumann algebra zero