Radium activity estimate

[andrew_mcewan@nrl.moh.govt.nz]

Rob Greger wrote
"I'm attempting to estimate the amount of Ra-226 in an old radium medical
source, and would appreciate advice. "

The activity present can be estimated from the gamma ray constant (8.25
mR/h per mCi at 1 metre is good enough in old units).  I also would see no
point and some risk in attempting to open the container.  I assume the wall
material is relatively thin and low atomic number i.e. not lead, so wall
shielding can be neglected.

Andrew McEwan

_________________________
Andrew C McEwan PhD
National Radiation Laboratory
PO Box 25-099
Christchurch, New Zealand

Ph 64 3 366 5059
Fax 64 3 366 1156
Andrew_McEwan@nrl.moh.govt.nz
________________________


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