Section 1: Particles & Radiation Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What is the realtionship between specific charge and mass?

A

specific charge is inversly proprtional to mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How do you find specific charge?

A

Charge/ mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is meant by spesific charge of a particle? untis?

A

the ratio of its charge to mass (C kg-1)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

describle how the strong nuclear force varies with the spereation of neuclons.

A
  • repulsive then attractive
    -short range (0.5- 2.5) fm ish
  • cross to atractive around 0.7 fm
    -prevents protons and neutrons from moving closer or further apart
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What neucles is the same as a alpha particle?

A

helium neucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the neuclon number?

A

number of protons and neurons, mass number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What guage boson is used in strong interaction? and what particles are effected?

A

guage boson - pion (0+-)
particles - hadrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What guage boson is used in electromagnetic interaction? and what particles are effected?

A

virtual photon
only charged particles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What guage boson is used in weak interaction? and what particles are effected?

A

w+ w- bosons
all types of particles are effected

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the equation for beta minus decay? and what is the guage boson present?

A

n—> p + electron + anti-neutrino. W-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the equation for beta plus decay? and why is the guage bosson present?

A

P—> n + (e+) + neutrino W+

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the equation for electron capture? and what is the guage bosson present?

A

P + e- —> n + netrino W+

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the equation for electron proton collision? What is the guage bosson present (why)?

A

Same as electron capture
P + (e-) —> n + neutrino
W- bosson because:
-comes from the electron
- W- to conserve charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What do kaons decay into?

A

Pions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How do you find the minimum energy for anhilation?

A

min energy of EACH photon = rest mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How do you find the minimum energy for pair production?

A

min energy of photon = 2x rest mass of the particle made

17
Q

How does a K- particle decay?

A

k- —> Pion 0 + (e-) + anti neutrino

18
Q

Explain what is meant by electron capture?

A
  • an orbital/shell electron
  • interacts with a proton in the neuclus
  • via the weak interaction
19
Q

State what roles exchange particles can play in an interaction.

A
  • transfer energy
    -transfer momentum
    -transfer force
    (somtimes) transfers charge
20
Q

What is an electrons lepton numbers and charge?

A

Le +1 lu 0 charge -1

21
Q

What is an electron neutrino lepton numbers and charge?

A

Le +1 lu 0 charge 0

22
Q

What is an muons’ lepton numbers and charge?

A

Le 0 lu +1 charge -1

23
Q

What is a muon neutrino lepton numbers and charge?

A

Le 0 Lu+1 charge 0

24
Q

What patricle is the only stable baryon?

A

proton

25
Q

What are caracterisitcs of a strange particle that makes it diffrent to particles that are not strange?

A
  • contains a strange quark
  • longer half life than expected
    -decays by the weak interaction
26
Q

What is annhilation?

A

The process of a particle and its antiparticle colliding and being converted into energy. The energy is released in two photons to conserve momentum.

27
Q

What are the products of pair production?

A

Two protons fired together - A proton anti proton pair.
A gamma photon -An electron positron pair

28
Q

What interaction is present for the dacay of strange particles? Is strangeness conseverd?

A

Weak interaction
Not always conserved

29
Q

In what sized atom does alpha decay usually happen?

A

In atoms with more than 82 protons

30
Q

Antiparticle:​

A

All particles have a corresponding antiparticle with the same mass but opposite charge and conservation numbers.

31
Q

What do muons deacy into?

A

Electrons

32
Q

Stopping Potential:​

A

The minimum potential difference required to stop the highest kinetic energy electrons from leaving the metal plate in the photoelectric effect.

33
Q

Threshold Frequency: ​

A

The minimum frequency of photons required for photoelectrons to be emitted from the surface of a metal plate through the photoelectric effect. It is equal to the metal’s work function divided by Planck’s constant.

34
Q

Work Function: ​

A

The minimum energy required to remove an electron from a metal’s surface.