Experiment F1 Flashcards
1
Q
Taking natural logarithms of equation (F1.2) gives
ln πΌ = ln πΌ0 β ππ₯.
β¬β¬βΊ Using equation (F1.2) and the definition of π₯1/2 show that
π₯1/2 = ln 2/π
A
2
Q
ln πΌ =
A
ln πΌ = ln πΌ0 β ππ₯.
3
Q
I =
A
Io exp (β ππ₯)
4
Q
I =
A
Intensity of gamma ray
5
Q
Io =
A
Initial absorption intensity
6
Q
π =
A
Co-efficient of absorption of gamma ray
7
Q
x =
A
Thickness
8
Q
x1/2 =
A
Half value layer, is when : I = Io/2 β> x = x1/2
9
Q
Way 1 of finding x1/2 from the experiments :
A
10
Q
Way 2 of finding x1/2 from the experiments :
A
11
Q
Way 3 of finding x1/2 from the experiments :
A
12
Q
π·π bare =
A
π(π΄πΈ/π2)
13
Q
A =
A
Ao exp (-Ξ»t)
14
Q
Ξ» =
A
ln2/t1/2
15
Q
n β‘ number of half value layers =
A
x/x1/2
