mgr inż. Aleksandra Stasik

ORCID: 0000-0002-0972-3550

The topic of my dissertation is “High-resolution Fourier-transform spectroscopy of the ¹²C¹⁶O molecule and deperturbation analysis of the a³Π state”

The primary focus of my research is high-resolution Fourier-transform spectroscopy of diatomic molecules, with a particular emphasis on carbon monoxide (CO).

This molecule plays a fundamental role in astronomy and astrophysics, as it is, after molecular hydrogen (H₂), the second most abundant compound in the interstellar medium (ISM).

Carbon monoxide is also detected in planetary and exoplanetary atmospheres, cometary comas, protoplanetary discs, interstellar clouds, nebulae, and even in solar spectra, where its molecular lines serve as sensitive indicators of physical conditions and chemical compositions in various astrophysical environments.

My doctoral research aims to record and analyse high-resolution spectra of the Cameron system (a³Π – X¹Σ⁺) for the ¹²C¹⁶O molecule and to perform a detailed deperturbation analysis of the vibrational levels a³Π(v = 0–6).

The a³Π state is the first excited electronic state of carbon monoxide and has great astrophysical significance due to its role in radiative emission processes in the interstellar medium.

Its metastable nature, long lifetime, and involvement in the formally forbidden a³Π–X¹Σ⁺ transition, activated through local spin–orbit perturbations, make it one of the most complex and scientifically intriguing systems investigated in modern molecular spectroscopy.

The expected outcome of this research is to obtain high-precision experimental data and spectroscopic parameters that will allow for a detailed description of the energy structure and perturbation mechanisms of the CO molecule.

The results will be of value for astrochemical modelling and the interpretation of high-resolution spectra of planetary and interstellar objects, contributing to a deeper understanding of molecular processes occurring in space.

Publication:

• Piotrowska, R. Hakalla, W. Szajna, R. Kępa, S. Ryzner, M. Malicka, A. Stasik,
  FT spectroscopy of the Comet-Tail system in ¹²C¹⁷O⁺: Deperturbation analysis of the A²Πᵢ(v = 0) level,Journal of Quantitative Spectroscopy and Radiative Transfer, 347: 109635 (2025), DOI: 10.1016/j.jqsrt.2025.109635 (MNiSW points: 140; IF: 3.70)
• I. Malicka, R. W. Field, S. Ryzner, A. Stasik, W. Ubachs, A. N. Heays, N. De Oliveira, W. Szajna, R. Hakalla, FT-spectroscopy of the ¹²C¹⁸O rare isotopologue and deperturbation analysis of the A¹Π(v = 3) level, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 312: 124011 (2024),
  DOI: 10.1016/j.saa.2024.124011 (MNiSW points: 140; IF: 4.10)
• Kaczor, A. Stasik, Dissipative Time Evolution of Entanglement in the Tetrahedral Structure of Spins s = ½ – a Numerical Analysis, International Journal of Theoretical Physics, 63: 4066 - 4079 (2024), DOI: 10.1007/s10773-024-05606-x (MNiSW points: 70; IF: 2.10)