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Physics ALevel OCR > Nuclear And Particle Physics > Flashcards

Flashcards in Nuclear And Particle Physics Deck (17)
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1
Q

3 observations and their significance in Rutherford alpha scattering experiment

A
  • most came through > mostly empty space >nucleus v small
  • some deflected, some more than 90 >not plum pudding > must be dense positive charge
  • protons couldn’t account for mass >neutrons must also be present
2
Q

What’s responsible for beta decay

A

Weak nuclear force

3
Q

What’s the strong nuclear force

A

The force holding nucleons together. Steiger than the repulsive force

4
Q

What is the strong force carried by?

A

Gluons

5
Q

Why do heavier elements have more neutrons than protons?

A

To dilute the strong electrostatic repulsion

6
Q

What carries the weak nuclear force?

A

Bosons (w and z)

7
Q

What are hadrons

A

Made up of quarks. Affected by strong nuclear force and the electromagnetic force of charged eg proton

8
Q

What’s a lepton

A

Fundamental particle or antiparticle not affected by the strong nuclear force eg electron

9
Q

What’s are baryons?

A

Hadrons made of 3 quarks

10
Q

What are mesons

A

Hadrons of 2 quarks, one normal and one anti

11
Q

Example of mesons

A

Kaons and pions

12
Q

What are neutrinos

A

Leptons with no charge or mass eg electron neutrino

13
Q

What is the Barton number of every quark

A

1/3

14
Q

What is a proton made up of

A

uud

15
Q

What’s a neutron made up of

A

udd

16
Q

Beta minus radiation equation

A

Neutron -> proton + beta minus + electron antineutrino

17
Q

Beta plus radiation equation

A

Proton -> neutron + beta plus + electron neutrino