Radioactivité Flashcards

1
Q

charge proton/électron

A

+/- 1,6.10E-19 C

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2
Q

unité de masse atomique

A

1 u.m.a = 1/12M(C-12) = 1,66E10-27 kg

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3
Q

unité d’énergie (eV —> J)

A

1 eV = 1,6.10E-19 J

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4
Q

1 u.m.a (MeV/c2)

A

931,5 MeV/c²

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5
Q

masse énergétique électron

A

me⁻ = 0,511 MeV/c²

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6
Q

quarks (fermions)

A

soumis à interaction forte
u = +2/3 e
d = -1/3 e

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7
Q

leptons (fermions)

A

non soumis à interaction forte
e⁻ = -e –> positon : e⁺ = +e
ν = 0 –> antineutrino : ṽ = 0

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8
Q

bosons

A

spin entier ou nul
interaction forte : gluon, W⁻, W⁺, Z⁰
interaction EM : photon

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9
Q

force de gravitation

A

force de portée infinie
la + faible des 4 forces

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10
Q

force électromagnétique

A

force électrique et magnétique
force de portée infinie
responsable de la cohésion électron/noyau
vecteurs : photons ɣ et X

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