Irregularities in Energy Sequences of Ni- Like Ions. Applications to Wavelengths Calculations of the Self-Photo Pumped 4f1P1 ? 4d 1P1 X-ray Laser Transition. GJSFR. 2017;17(F6):9-23. Accessed February 5, 2026. https://www.journalofscience.org/index.php/GJSFR/article/view/101236