Energy Levels of Singly-Ionized Platinum

Area of Science:

• Atomic Physics
• Spectroscopy
• Quantum Mechanics

Background:

• The electronic structure of Platinum II (Pt II) is complex, requiring precise experimental data and theoretical models for accurate interpretation.
• Previous analyses of Pt II have provided a foundation, but further refinement is needed to fully understand its energy levels and configurations.

Purpose of the Study:

• To extend the analysis of Platinum II (Pt II) using new, accurate wavelength measurements.
• To identify and characterize new even and odd parity energy levels in Pt II.
• To interpret the observed energy levels using advanced theoretical methods, focusing on electron-shell interactions.

Main Methods:

• Utilized accurate wavelength measurements from Sansonetti et al. for the analysis of Pt II.
• Employed the Slater-Condon parametric method for theoretical interpretation of electronic configurations.
• Focused on low even configurations (5d⁹, 5d⁸6s, 5d⁷6s²) and high even configurations (5d⁸(7s+6d)).

Main Results:

• Discovered 43 new even and 104 new odd energy levels for Pt II.
• Achieved high accuracy in interpreting configurations, with root mean square deviations below 80 cm⁻¹.
• Demonstrated the critical role of the 5d⁸-5d⁷6s core interaction in explaining the even-parity levels.

Conclusions:

• The extended analysis significantly increases the number of known energy levels for Pt II.
• The Slater-Condon method, incorporating core interactions, provides a robust framework for understanding Pt II's atomic structure.
• Further investigation into core-shell interactions is crucial for a complete understanding of Pt II spectra.