Units (2)

Question 1

Exposure Dose units

Answer 1

(R) Roentgen

based upon the ionization of air

amount of radiation to liberate positive and negative charges in 1cm³ air

Question 2

Absorbed Dose Units

Answer 2

(RAD) Radiation Absorbed Dose [CGS]

(Gy) Gray [SI]

unit of dose in matter to produce 100ergs (CGS) or 1j (SI) of energy.

Question 3

Conversion for RAD to Gy

Answer 3

100 RAD = 1 Gy

Question 4

Weighting Factor units

Answer 4

(RBE) Relative Biological Effectiveness [CGS]

(Q) Quality Factor [SI]

ratio of biological damage from the absorption of radiation relative to radiation type

Question 5

Weighting Factors for different types of Radiation

Answer 5

Beta = 1
Gamma = 1
X-Ray = 1
Electron = 1

Neutron <10KeV = 3
Neutron >10KeV = 10

Alpha = 20
Fission = 20
Recoil = 20

Question 6

Dose Equivalent units

Answer 6

(Rem) Roentgen Equivalent Man [CGS]

(Sv) Sievert [SI]

used to express human biological doses as a result of radiation exposure

Question 7

Formula for Dose Equivalent

Answer 7

Rem = RAD x RBE

Sv = Gy x Q

Question 8

Conversion for Rem and Sv

Answer 8

1 Sv = 100 Rem