In this section
@article{Walter:2022:10.1063/5.0082601,
author = {Walter, N and Doppelbauer, M and Marx, S and Seifert, J and Liu, X and Pérez-Ríos, J and Sartakov, BG and Truppe, S and Meijer, G},
doi = {10.1063/5.0082601},
journal = {J Chem Phys},
title = {Spectroscopic characterization of the a3Π state of aluminum monofluoride.},
url = {http://dx.doi.org/10.1063/5.0082601},
volume = {156},
year = {2022}
}
TY - JOUR
AB - Spectroscopic studies of aluminum monofluoride (AlF) have revealed its highly favorable properties for direct laser cooling. All Q lines of the strong A1Π ← X1Σ+ transition around 227 nm are rotationally closed and thereby suitable for the main cooling cycle. The same holds for the narrow, spin-forbidden a3Π ← X1Σ+ transition around 367 nm, which has a recoil limit in the µK range. We here report on the spectroscopic characterization of the lowest rotational levels in the a3Π state of AlF for v = 0-8 using a jet-cooled, pulsed molecular beam. An accidental AC Stark shift is observed on the a3Π0, v = 4 ← X1Σ+, v = 4 band. By using time-delayed ionization for state-selective detection of the molecules in the metastable a3Π state at different points along the molecular beam, the radiative lifetime of the a3Π1, v = 0, J = 1 level is experimentally determined as τ = 1.89 ± 0.15 ms. A laser/radio frequency multiple resonance ionization scheme is employed to determine the hyperfine splittings in the a3Π1, v = 5 level. The experimentally derived hyperfine parameters are compared to the outcome of quantum chemistry calculations. A spectral line with a width of 1.27 kHz is recorded between hyperfine levels in the a3Π, v = 0 state. These measurements benchmark the electronic potential of the a3Π state and yield accurate values for the photon scattering rate and for the elements of the Franck-Condon matrix of the a3Π-X1Σ+ system.
AU - Walter,N
AU - Doppelbauer,M
AU - Marx,S
AU - Seifert,J
AU - Liu,X
AU - Pérez-Ríos,J
AU - Sartakov,BG
AU - Truppe,S
AU - Meijer,G
DO - 10.1063/5.0082601
PY - 2022///
TI - Spectroscopic characterization of the a3Π state of aluminum monofluoride.
T2 - J Chem Phys
UR - http://dx.doi.org/10.1063/5.0082601
UR - https://www.ncbi.nlm.nih.gov/pubmed/35364883
VL - 156
ER -