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Physics > Particle Physics > Flashcards

Particle Physics Flashcards

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1
Q

Below 1fm the string nuclear force is…

A

repulsive

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2
Q

Above 1fm the string nuclear force is…

A

Attractive

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3
Q

What is the range of the weak nuclear force?

A

Around 10^-18m

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4
Q

What is the weak nuclear force responsible for?

A

Beta decay

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5
Q

What are the two main categories of particles?

A

Hadrons and Leptons

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6
Q

Which are fundamental hadrons or leptons?

A

Leptons

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7
Q

How many quarks do Baryons have?

A

3

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8
Q

What are the two types of Hadrons?

A

Baryons and Mesons

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9
Q

What are mesons made from?

A

A quark and antiquark

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10
Q

What is a proton made from?

A

2 up quarks, one down quark

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11
Q

What is a nuetron made from?

A

2 down quarks, 1 up quark

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12
Q

What are the six leptons?

A

Electron, Electron neutrino, muon, muon neutrino, tau neutrino, tau

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13
Q

Give examples of bosons

A

Photons, gluon, Higgs, z and w

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14
Q

Do leptons experience the strong nuclear force?

A

No

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15
Q

What is the charge of an up quark?

A

+2/3

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16
Q

What is the charge of a down quark?

A

-1/3 e

17
Q

What charge does a strange quark have?

A

-1/3

18
Q

What does the weak nuclear force do?

A

Causes the transformation of quarks via the emission of leptons

19
Q

What are the products in beta minus decay?

A

an electron and antinuetrino

20
Q

What are the products in beta plus decay?

A

a positron and neutrino

21
Q

What is the mass defect?

A

Mass of all nucleons - Mass of nucleus

22
Q

What is a thermal nuetron?

A

A nuetron with an EK similar to that of those in a reactor core, a slow moving electron

23
Q

What is the role of the moderator in a fission reactor?

A

Slows down nuetrons

24
Q

What is the role of the control rods?

A

Absorb nuetrons (made from boron/ cadmium)

25
Q

What is binding energy?

A

The minimum energy required to separate a nucleus into constituent protons and neutrons

Physics (20 decks)

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