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Flashcards in Particles Deck (17)
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1

What is the definition of an isotope?

An atom with the same number of protons but a different number of neutrons.

2

What is the nucleon number?

the total number of of protons and neutrons

3

what is the proton number?

the total number of protons

4

what is specific charge?

the charge mass ratio of a particle0
measured in C/Kg

5

Describe the nature of an alpha particle

a helium nucleus

6

state four neutrinos

electron, muon, electron neutrino, muon neutrino

7

Define Hadron

a Hadron is a particle that feels the strong force

8

Define Baryon

A hadron containing 3 quarks

9

Define meson

A hadron containing a quark and an anti-quark

10

describe the quark structure of a proton and neutron

proton: uud
neutron: udd

11

give the quark structure of a pion+ and pion-

pion+:ud'
pion-:du'

12

describe the range of the strong nuclear force

Attractive between 0.5 and 3fm, and overcomes the electrostatic repulsion between protons in that range.
At less than 0.5fm, its very repulsive

13

what are the exchange particles for weak nuclear force

W+ and W-

14

what force allows for a change in strangeness of quarks?

weak nuclear force

15

describe electron capture through an equation

p + e- --> n+Ve

16

describe positron decay

p --> n+ e+ +Ve

17

give an equation describing the energy of particles in pair production

2E(0)=2E(min) = 2hf(min)
as protons and anti-protons meet releasing photons.
E(0) is rest energy of particles
E(min) is the minimum energy of the photons
h is planks constant
f is min frequency of photons