January 31, 2015

Homework Help: nuclear physics

Posted by amy on Thursday, February 3, 2011 at 12:03am.

A researcher wishes to extract
La from
Ba. She obtains a 1000 MBq virgin
Ba-140 sample and must wait until the maximum activity of La-140 is available.

a) Write down the decay relationship (include half-lives), and
include the final stable product. How long must the researcher
wait until there is maximum
La available?

b)What activity of
La does she collect, is she extracts the
completely from the
Ba, when the
La is at maximum

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