Radioactivity

Question 0

Rad

Answer 0

100 ergs dose absorbed per g tissue

Question 1

Curie

Answer 1

Ci = 3.7 x 10^-10 disintegrations/s

Question 2

Erg

Answer 2

CGS system unit equal to 10^-7 joules, equal to force of 1 dyne over 1 cm.

Question 3

Roentgen

Answer 3

2.58 x 10^-4 coulomb per kg air of exposure

Question 4

Rem

Answer 4

Dose of ionizing radiation in terms of its est. bio effect. Depends on bio effects & conditions of irradiation considered. Eg, each is approx 1 rem:
1 roentgen x-ray or gamma
1 rad x-ray, gamma, or beta
.1 rad neutron or “high energy” alpha
.05 rad of particles heavier than proton w sufficient energy to reach eye lens

Question 5

Inverse Square Law

…of radiation intensity by distance

Answer 5

I(1) * d(1)^2 = I(2) * d(2)^2
or
I(2) = I(1) * (d(1)^2 / d(2)^2)