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Old May 5th 2010, 01:03 PM   #1
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neutron scattered and absorbed problem

What is the probability a 1 eV neutron will be scattered and absorbed passing through 1 cm of water?
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Old May 6th 2010, 02:24 PM   #2
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One can find 1/L = 2.18 cm^-1 here
http://www.lanl.gov/orgs/n/n1/panda/00326407.pdf
I = I_0 exp( -x/L )
P=(I_0 - I)/I_0 = 1 - exp( -x/L).
x = 1 cm
we get
P = 1 - exp( -2.18 ) = 0.887 or 88.7 %.
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