Lecture 12

Question 1

Gamma rays are a type of…

Answer 1

Electromagentic radiation

Question 2

The volume of a nucleus is proportional to…

Answer 2

the number of nucleons

Question 3

What is the binding energy of the nucleus?

Answer 3

The difference between the sum of energies of the composing free nucleons and the energy of the nucleus.

Question 4

How can binding energy be calculated?

Answer 4

Einstein’s mass-energy equation

E=mc²

Question 5

The nuclei of elements nearest to…are the most strongly bound ones.

Answer 5

Iron

Question 6

Answer 6

Alpha Decay, producing ⁴₂He

Question 7

Answer 7

Beta Decay, producing ⁰_-1e

Question 8

What is radioactivity?

Answer 8

The disintegration or decay of an unstable nuclei plus the associated radiations.

Question 9

What is ‘λ’ in radioactivity?

Answer 9

The Decay constant

Question 10

Formula to calculate the number of nuclei in radiation

Answer 10

Question 11

Formula to calculate λ

Answer 11

Question 12

Formula to calculate radioactive decay of an ingested isotope.

Answer 12

T_{<strong>b</strong>} = Biological half life

Question 13

Light projectile + Heavy Target →

Answer 13

Heavy Product + Light Product e.g a gamma photon

(Nuclear Reaction)

Question 14

Charged particles need very high energy to overcome the…

Answer 14

Coulomb repulsion

Question 15

How does alpha radiation travel?

Answer 15

In a straight line

Question 16

Give a highly penetrating radiation

Answer 16

Gamma