S S S - physics.umd.edu Notation in... · Configuration . Term . J . Level (eV) 1s2. ... electron...

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NIST Atomic Spectra Database Levels Data Some data for neutral and singly-charged ions are available in the Handbook of Basic Atomic Spectroscopic Data He Spectrum http://physics.nist.gov/PhysRefData/ASD/levels_form.html P o odd parity Ψ(-r)=-Ψ(r) Configuration Term J Level (eV) 1s 2 1 S 0 0.0 1s2s 3 S 1 19.8196134 1s2s 1 S 0 20.6157736 1s2p 3 2 20.9640857 1 20.9640951 0 20.9642176 1s2p 1 1 21.2180214 1s3s 3 S 1 22 7184651 2 1 S S S + = 2 1 L L L + = S L J + = 0 , 0 , 0 = = = J L S 1 , 0 , 1 = = = J L S 2 , 1 , 0 , 1 , 1 = = = J L S S=1 lower energy (space anti-symm)

Transcript of S S S - physics.umd.edu Notation in... · Configuration . Term . J . Level (eV) 1s2. ... electron...

NIST Atomic Spectra Database Levels Data Some data for neutral and singly-charged ions are available in the Handbook of Basic Atomic Spectroscopic Data

He Spectrum

http://physics.nist.gov/PhysRefData/ASD/levels_form.html

Po odd parity Ψ(-r)=-Ψ(r)

Configuration Term J Level (eV)

1s2 1S 0 0.0

1s2s 3S 1 19.8196134

1s2s 1S 0 20.6157736

1s2p 3P° 2 20.9640857

1 20.9640951

0 20.9642176

1s2p 1P° 1 21.2180214

1s3s 3S 1 22 7184651

21 SSS

+=

21 LLL

+=SLJ

+=0,0,0 === JLS

1,0,1 === JLS

2,1,0,1,1 === JLS

S=1 lower energy (space anti-symm)