relationship between dose rate and amount of radioactive particles

winnie_t

Hi,

This might be a silly question but I've been struggling to find this out.

What is the relationship between dose rate and the amount of Cs-137 in an area?

if I know the exposure dose of the area is 5mSv, how can I work out how much Cs-137 is in this area?

Thanks

mfb

5mSv in what time frame?
In addition, it depends on the location of Cs-137. Is it in the ground, or in the air, or somewhere else? How deep in the ground? ...

For a rough estimate of the activity, you can divide the number of Cs-137-atoms in some volume by the lifetime to get the decays per time and volume. Multiply it with the decay energy to get the released energy per time and volume.

mkarger

We would need to know the length of time of exposure, the location of the source from the measurement point and any potential medium that the sourced energy must travel through.

Similar Threads for: relationship between dose rate and amount of radioactive particles
Thread	Forum	Replies
Does amount of electrons orbiting an atom effect rate of radioactive decay?	Chemistry	3
Relationship of absorbed dose (Gray) to cf-252 activity (milicurie/hour)	Introductory Physics Homework	0
Dose rate	Introductory Physics Homework	1
Radiation Dose Rate!	Advanced Physics Homework	3
How does a dose rate meter determine dose with only a GM tool?	General Physics	9

winnie_t	relationship between dose rate and amount of radioactive particles Tweet Hi, This might be a silly question but I've been struggling to find this out. What is the relationship between dose rate and the amount of Cs-137 in an area? if I know the exposure dose of the area is 5mSv, how can I work out how much Cs-137 is in this area? Thanks

mfb Mentor	5mSv in what time frame? In addition, it depends on the location of Cs-137. Is it in the ground, or in the air, or somewhere else? How deep in the ground? ... For a rough estimate of the activity, you can divide the number of Cs-137-atoms in some volume by the lifetime to get the decays per time and volume. Multiply it with the decay energy to get the released energy per time and volume.

mkarger	We would need to know the length of time of exposure, the location of the source from the measurement point and any potential medium that the sourced energy must travel through.