Quantum mechanics

Ultraviolet

Chemical physics

Photochemistry

Materials science

Atomic physics

Excitation

Molecule

Dissociation (chemistry)

Physical chemistry

Visible spectrum

Physics

Organic chemistry

Ionization

Mathematics

Optics

Computational chemistry

Geometry

Excited state

Chemistry

Symmetry (geometry)

Photodissociation

Molecular symmetry

The Journal of Chemical Physics

With the preparing of SO2+(X̃ 2A1(000)) by [3+1] multiphoton ionization of the neutral SO2 molecules at 380.85 nm, the photodissociation process and the symmetry of the excited states D̃ of SO2+ molecular ions has been investigated by measuring the photofragment SO+ excitation (PHOFEX) spectrum in ultraviolet (282–332 nm) and in visible (562–664 nm) wavelength ranges, respectively. The D̃(v100), D̃(0v20)←X̃ 2A1(000) transitions of SO2+ were assigned in the PHOFEX spectrum in the UV range. By comparing the discernible PHOFEX spectrum in UV range with the continuous PHOFEX spectrum in visible range, it is deduced that (i) around SO2+(D̃) there exists a repulsive state α 2A2 converging to the dissociation limit of SO+(X 2Π)+O(3Pg), (ii) the coupling between SO2+(D̃) and SO2+(α 2A2) leads to the dissociation to SO+(X 2Π)+O(3Pg), (iii) the symmetry of D̃ state is D̃ 2B1.

Studies on the photodissociation and symmetry of SO2+(D̃)