Radiation Dosimetry – Verified Q&A Summary for U.S. Regulatory and Practical Concepts

Radiation Dosimetry questions with verified
answers
1 Ci = ___________ disintegrations per second Ans✓✓✓ 3.7x1010


A measure given in Ci describes ____________? Ans✓✓✓ The
radioactivity of a substance.


A measure in rem (or mrem) identifies the _________? Ans✓✓✓
Amount of energy that a radioactive source deposits in living tissue.


Acronym used for remembering units of radiation. Ans✓✓✓ R -
radioactivity
E - exposure
A - absorbed dose
D - dose equivalent


After both external exposure and internal
contamination: various units are used including: Ans✓✓✓ Total
Effective Dose Equivalent ( TEDE)


After internal contamination: various units are
used including: Ans✓✓✓ Committed Effective Dose Equivalent (CEDE)

, Biological dose equivalents are commonly
measured in ________? Ans✓✓✓ 1/1000th of a rem (known as a
millirem or mrem)


Combines the amount of radiation absorbed and
the medical effects of that type of radiation. Ans✓✓✓ Dose Equivalent
- Beta and Gamma radiation
• Dose equivalent = Absorbed dose
- Alpha and Neutron radiation
• Dose equivalent > Absorbed dose
- More damaging to the human body


Of the personnel monitoring devices, which is considered the least
sensitive for recording very low exposure Ans✓✓✓ Film badge
dosimeters


Quality factor for alpha: Ans✓✓✓ 20


Quality factor for Neutron: Ans✓✓✓ 10


Quality factor for x-ray, gamma, beta: Ans✓✓✓ 1


Quantity of radioactive material is expressed in