Monday
April 21, 2014

Homework Help: nuclear physics

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

A researcher wishes to extract
140
La from
140
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
140
La available?

b)What activity of
140
La does she collect, is she extracts the
140
La
completely from the
140
Ba, when the
140
La is at maximum
activity?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry - Ba-140 has a half life of 13.0 days. What fraction of a sample of Ba...
Physics - What daughter isotopes are produced when a neutron combines with a ...
Physics HELP!! - What daughter isotopes are produced when a neutron combines ...
Math - Is it possible to do this 432(140-x)^3 = 60480-432x^3 or do i have to ...
algebra - add the following - 4/7 + [ -7/20] 7*20= 140 so -60/140 + - 49/140= 11...
Physics Cont'd - Quidditch - For time t = d/v 140/20 t= 7 0 = 1/2(-10)(7^2)+(15...
Normal Public High School Chemistry - Please assist me in answer this question ...
Physics - When a positive charge moves in the direction of the electric field, ...
algebra - y varies directly with x If x=52 when y=130, find x when y=140 i got ...
more CHEM proofreading - for this question A sample of air has a volume of 140.0...

Search
Members