How determined the dose rate of gamma rays cobalt (60Co)as source with an activity of 6 mCi and doses levels of 0, 50, 100 and 200 Gy, ?
How does this dose rate then apply for thin films?
The gamma constant for Co-60 is 0.152 mGy/h at 30 cm per mCi. 5 mCi will be 0.912 Gy/h. Divide each dose level by 0.912 for the number of hours exposure. The dose rate will change with distance by the square of the distance so dose rate will change.
Dose to thin films will be affected by material before or after the film. If the film is large in area, the dose rate will change over the film depending upon distance from the source.
Joseph L Alvarez.
Dear Sir
Thanks for your answer .
How much the does rate if the gamma dose are ( 50, 100 and 200)
with my best wishes
- Badges
- Science topic
- Similar topics
- Chemistry
- Nanotechnology
- Nanostructures
- Thin Films