Problem 52065. Nuclear Binding Energy

Created by David Hill

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Compute the approximate nuclear binding energy in MeV using the least-squares fit of the semi-emirical mass formula. Round to the nearest MeV.

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Last Solution submitted on Jun 18, 2021

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Are Mjaavatten on 16 Jun 2021

Nice with a problem that is not purely mathematical!
Using the parameters for Least Squares Fit(1) from Wikipedia, I get values that differ from yours by up to 2 MeV (except for Li-7, where I get 38, while you get 34). Do you use a different parameter set, or have I made a mistake?

David Hill on 16 Jun 2021

I apologize, I messed up the polarity. Should be fixed now.

Are Mjaavatten on 16 Jun 2021

Thanks. I now pass every test except 6:

bindingEnergy({'Tl-203','Pb-208','Po-209','Ra-228'})
ans =
1596 1628 1632 1750
>> be
be =
1595 1628 1633 1749
Any ideas?

David Hill on 16 Jun 2021

I assume you are rounding at the end. Before rounding
[1595.950245381877 1628.458256218912 1632.283183807810 1750.279872731407]
I checked that my Z and N are correct, coefficients are correct, last term is correct. All answers should be correct.

ChrisR on 17 Jun 2021

I get the answers in the test suite.

Are Mjaavatten on 17 Jun 2021

My fault. Somehow I was still testing against the old test values. Sorry for the inconvenience.

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Problem 52065. Nuclear Binding Energy

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Problem 52065. Nuclear Binding Energy

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