O(1s) photodissociation dynamics of gas-phase HO

Harries, J.; Gejo, Tatsuo*; Kuniwake, Miki*; Homma, Kenji*; Oura, Masaki*; Sullivan, J. P.*; Azuma, Yoshiro*

Photo-excitation of the O 1s electron in HO can lead to the production of neutral, excited H atoms. Knowledge of the excited state distribution provides information on the dissociation dynamics process. Excitation of the O 1s electron leads to a HO ion core. Auger decay subsequently leads to HO, which dissociates, and one of the fragments can capture the initially excited electron. If this fragment is H, excited neutral H atoms are formed. In this research we use pulsed synchrotron radiation as the excitation source, and detect the UV fluorescence emitted when the excited H atoms decay. Analysis of the decay lifetimes leads to information on the excited state distribution.