In XPS of ZnO, I obtained two peaks corresponding toZn2p5/2 and Zn2p3/2. I am trying to Understand their significance and difference between them.
2p describes the electronic shell of the atom: 2-> principal quantum number of the electron shell / p -> form of the subshell, angular quantum number or orbital quantum number, respectively.
3/2 & 5/2 spin-orbit coupling between electron subshell momentum and spin of the electron. The 2p3/2 is filled with 4 electrons while the 5/2 has 6 electrons. This defines the intensity ratio of the XPS peaks.
See any good book on 'Quantum Mechanics' or 'Introduction in XPS' for details.
I feel necessary to add some corrections:
1. The notations Zn2p5/2 and Zn2p3/2 are wrong. They should be Zn2p3/2 and Zn2p1/2.
2. p-orbital can be filled with no more than six electrons in total, not with ten.
@ Konstantin I. Maslakov
Actually I was wondering about that. In few papers Zn2p5/2 and Zn2p3/2 were used, while in some papers Zn2p3/2 and Zn2p1/2 was used for same peaks. thanks for the correction.
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