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The study aims to explore negative ion formations from water and heavy water upon absorption of vacuum ultraviolet light.

Negative ion formation from water molecule following absorption of vacuum ultraviolet light

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The study aims to explore negative ion formations from water and heavy water upon absorption of vacuum ultraviolet light.
Investigated negative ion formations through ion-pair photodissociation and dissociative photoionization.
Utilized an imaging technique in conjunction with pulsed synchrotron light in a photon energy range of 17 to 41 eV.
Measured cross sections for the formation of H-, D-, O-, and OH-/OD- ions.
Observed significant isotope effects in negative ion formation.
Kinetic energies of O- and H-/D- ions correlated with increasing photon energy.
Revealed mechanisms of two-body and three-body ion-pair photodissociations, noting the axial recoil approximation breakdown in three-body processes.

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Randomized trial investigates negative ion formation from water using advanced imaging techniques, revealing significant photon energy effects.

Odagiri et al. (2026) studied this question.

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Randomized trial investigates negative ion formation from water using advanced imaging techniques, revealing significant photon energy effects.