# Homework Help: Write down the ground state eigenfunction (and spin) of Helium.

1. Dec 9, 2011

### helpcometk

1. The problem statement, all variables and given/known data
Already it is on title !!!

2. Relevant equations
attachents provide the most relevant equations i could find.

3. The attempt at a solution
I have found some old books written in 1920 decade ,dealing with this subject,but the solution they provide seems very hard understand,although it might be correct.

i have in my possesion proof of the formula for the expectation energy of helium atom.
But i dont know if and how could this be related to the ground state eigenfunction.
i cant really provide more relevant formulas ,but it must be appreciated that this is not an easy problem.

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2. Dec 11, 2011

### helpcometk

In the meantime i have found very important additional information using the textbook of chris foot called atomic physics.
The total groundstate eigenfunction ψ of helium must be the product of spin part and spatial part i.e

ψ= ψspin ψspatial= (according to this textbook) =( ms) (u1sunl) = (according to tables provided in this book i.e table 2.2 )= {√1/4π}{(z/a)3/2 (2e-p)}