Basic Radiation Units
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Conventional Unit of Exposure | Roentgen (R)
🗑
|
||||
| SI Unit of Exposure | Coulomb/kg (C/kg)
🗑
|
||||
| Conventional Unit of Absorbed Dose | rad (R x f-factor)
🗑
|
||||
| SI unit of Absorbed Dose | gray (Gy)
🗑
|
||||
| How many rads in 1 Gy? | 100 rads = 1Gy
🗑
|
||||
| Conventional unit of Equivalent dose | rem
🗑
|
||||
| SI unit of Equivalent dose | sievert (Sv)
🗑
|
||||
| How many rem in 1 Sv? | 100 rem = 1Sv
🗑
|
||||
| Conventional unit of radioactivity | Curie (Ci)
🗑
|
||||
| SI unit of radioactivity | becquerel (Bq)
🗑
|
||||
| Definition of Exposure? | Metric of ionization of air due to radiation. Only defined for xrays and gamma rays.
🗑
|
||||
| Definition of Absorbed dose? | Energy deposited by radiation in a given mass of material.
🗑
|
||||
| What are some qualities of the f-factor? | Varies with Z, varies with photon energy. At diagnostic levels, is >1 for bone, roughly = 1 for soft tissue, and <1 for fat.
🗑
|
||||
| Definition of Equivalent dose? | Absorbed dose x radiation weighting factor. Corrects for the fact that heavy particulate radiation (protons, neutrons, alpha) are more damaging that EMR and electrons.
🗑
|
||||
| Radiation weighting factor of X-rays, gamma rays, beta particles, and electron? | 1
🗑
|
||||
| Radiation weighting factor of protons? | 5
🗑
|
||||
| Radiation weighting factor of neutrons? | 5-20 (energy dependent)
🗑
|
||||
| Radiation weighting factor of alpha particles and other multiple charged particles? | 20
🗑
|
||||
| Definition of Effective Dose? | equivalent dose x tissue weighting factor. Considers how sensitive given tissue is to radiation.
🗑
|
||||
| What tissue has the highest tissue weighting factor? | Gonads (20)
🗑
|
||||
| What number do all tissues weighting factors summed equal? | 1
🗑
|
||||
| What was the original definition of the curie? | the activity of 1g of pure radium (3.7 disintegrations/s)
🗑
|
||||
| How many dps (disintegrations per second) per Bq? | 1 dps
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
jbs42
Popular Physics sets