Experiment F1

Question 1

Taking natural logarithms of equation (F1.2) gives
ln 𝐼 = ln 𝐼0 ― 𝜇𝑥.

▬▬► Using equation (F1.2) and the definition of 𝑥1/2 show that
𝑥1/2 = ln 2/𝜇

Answer 1

Question 2

ln 𝐼 =

Answer 2

ln 𝐼 = ln 𝐼0 ― 𝜇𝑥.

Question 3

I =

Answer 3

Io exp (― 𝜇𝑥)

Question 4

I =

Answer 4

Intensity of gamma ray

Question 5

Io =

Answer 5

Initial absorption intensity

Question 6

𝜇 =

Answer 6

Co-efficient of absorption of gamma ray

Question 7

x =

Answer 7

Thickness

Question 8

x1/2 =

Answer 8

Half value layer, is when : I = Io/2 —> x = x1/2

Question 9

Way 1 of finding x1/2 from the experiments :

Answer 9

Question 10

Way 2 of finding x1/2 from the experiments :

Answer 10

Question 11

Way 3 of finding x1/2 from the experiments :

Answer 11

Question 12

𝐷𝑅bare =

Answer 12

𝑘(𝐴𝐸/𝑟2)

Question 13

A =

Answer 13

Ao exp (-λt)

Question 14

λ =

Answer 14

ln2/t1/2

Question 15

n ≡ number of half value layers =

Answer 15

x/x1/2

Question 16

factor =

Answer 16

(1/2)^𝑛

Question 17

Dose rate =

Answer 17

Drbar x factor x time

Question 18

𝐷𝑅shielded =

Answer 18

𝐷𝑅bare × factor

Question 19

𝐷 =

Answer 19

𝐷𝑅shielded × time