Discussion of the master's thesis of the student " Hanin Laith Abdul Karim"

In Arabic News Archive 2025-09-03 56 Vistors

Discussion of the master's thesis of the student " Hanin Laith Abdul Karim"

The public discussion took place for the master’s student (Hanin Laith Abdul Karim) Department of Physics- College of Science - University of Anbar on Wednesday, September 3, 2025, in Ibn Sina Hall. for his tagged thesis

" Fermi-hole in the state 2s2 of atoms and ions with 4≤Z≤20 "

The discussion committee consisted of:

University of Baghdad - Ibn Al-Haitham College of Education - President	Prof. Dr. Samira Ahmed Ibrahim
University of Anbar - College of Sciences - Member	Prof. Dr. Adel Nima Ayash
University of Anbar - College of Sciences - Member	Assist. Prof. Dr. Nabil Fawzi Latofi
University of Anbar - College of Sciences - member and supervisor	Dr. Wissam Ahmed Amin

This thesis investigates the Fermi-hole shift in the 1s²2s² configuration of atoms and ions within 4 ≤ Z ≤ 20, using the Hartree–Fock approximation combined with the partitioning technique. A dedicated code was developed in Wolfram Language, and all results are expressed in atomic units.

Five electronic properties were analyzed: the interparticle distribution function f(r??), the partial two-particle distribution g(r??,r?), the Fermi hole ?f(r??), the partial Fermi hole ?g(r??,r?), and the pairing energy Vee, in both singlet (¹S) and triplet (³S) states.

The results show that increasing Z compresses the electronic cloud, shifts the distribution peak toward shorter interelectronic distances, and deepens the Fermi hole in triplet states due to stronger exchange repulsion. The magnitude of the Fermi-hole shift decreases with Z, while the pairing energy increases steadily, reflecting stronger electron–electron interactions in the inner shells.