The Stark Effect, Zeeman Effect, and Transition Dipole Moments for the B 2Σ+-X 2Σ+ Band of Aluminum Monoxide, AlO

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Abstract

The experimentally measured radiative lifetimes and branching ratios were combined to determine the transition dipole moments for the B 2Σ+(v = 0-3) → X 2Σ+(v = 0-6) bands of aluminum monoxide, AlO, and compared with theoretical predictions. The B 2Σ+-X 2Σ+ (0, 1) band of a molecular beam sample of AlO was recorded at high spectral resolution both field-free and in the presence of static electric and magnetic fields. The 27Al(I = 5/2) hyperfine interaction in the B 2Σ+(v = 0) state was analyzed. The observed Stark shifts were analyzed to produce permanent electric dipole moments of 1.94(8) D and 4.45(3) D for the B 2Σ+(v = 0) and X 2Σ+(v = 1) states, respectively. It is demonstrated that the observed Zeeman spectra can be simulated using an effective Hamiltonian with the associated expected g-factors for both the X 2Σ+(v = 1) and B 2Σ+(v = 0) states.

Original languageEnglish (US)
Article number147
JournalAstrophysical Journal
Volume889
Issue number2
DOIs
StatePublished - Feb 1 2020

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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