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O; H
yield and kinetic energy, and ion-H coincidence studiesHarries, J.; Iseda, Mitsuhiro*; Kuniwake, Miki*; Homma, Kenji*; Gejo, Tatsuo*; Sullivan, J. P.*; Azuma, Yoshiro*
no journal, ,
We report here on studies where metastable H
atoms and VUV photons are detected following the O 1s excitation of HO. The studies reveal new information not accessible with ion or electron techniques. The studies are performed using pulsed soft X-ray synchrotron radiation at SPring-8's BL27SU. Metastable particles and VUV photons are directly detected using 2 MCP detectors, and the arrival times of the particles are recorded relative both to each other and to the pulses of incoming radiation. The technique allows the separation of VUV and metastable particle yield, and the study of fluorescence lifetimes. The time-resolved detection of Lyman-
radiation allows the determination of the population distribution of excited H atoms.
Gejo, Tatsuo*; Iseda, Mitsuhiro*; Homma, Kenji*; Harries, J.; Tamenori, Yusuke*
no journal, ,
When a cluster undergoes inner-shell excitation, as well as electrons and ions fluorescence photons can also be detected. Depending on the excited state, the lifetime of this fluorescence is different, and so recording the arrival times of the photons relative to the exciting radiation, information can be obtained on the excited state distribution. This technique has previously been applied to the helium atom and water molecule, and is applied to clusters for the first time here. For argon clusters there are broadly two lifetime components, and their origin is discussed.