nuclear physics

Question 1

Relation between half-life and decay constant:

Answer 1

𝑇1 2= 0.693\ 𝜆

Question 2

alpha paricles

Answer 2

Alpha particle is 7000 times more massive than electron

Question 3

beta particles

Answer 3

-Its ionization ability is 100 times less than alpha particles
-Its range is 100 time more than alpha particles

Question 4

Radioactive Absorbed Dose:

Answer 4

-The amount of energy absorbed from an ionizing radiation per unit mass of absorbing body is called absorbed dose.
-D= energy absorbed/ mass D= 𝐸𝑚, its SI unit is Gray.
-The amount of energy equal to one joule absorbed by a body of mass 1kg is called gray. 1Gy= 1J/kg And one rad=0.01 Gy.

Question 5

Amount of radiations is normally considered safe:

Answer 5

1 mSv

Question 6

Uses of Radioactive Tracer:

Answer 6

▪ In medicine: It is used to detect malignant tumors
▪ In agriculture: It is used to uptake the fertilizer by a plant
▪ In understanding the complex process of photosynthesis
▪ In identification of faults in underground pipes of fountain system

Question 7

Which isotope is
used for blood
circulation checking

Answer 7

Sodium 24

Question 8

Which isotope is
used to cure cancer
in radiotherapy

Answer 8

Cobalt 60

Question 9

Which isotopes is
used to cure thyroid
cancer

Answer 9

Iodine 131

Question 10

Which isotope is
used for skin cancer

Answer 10

Phosphorous 32,
Strontium 90