| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Research Abstract |
Doubly excited states of molecular hydrogen decay mainly via autoionizations or neutral dissociations. The dynamics of the competitive decay is sometimes described by the semi-classical approximation. In the present study, we would like to experimentally verify the validity of the semi-classical approximation by measuring (i) a time-of-flight spectrum of the metastable atomic fragments, the H(2s) atoms, in photoexcitation of H_2 with the electronic symmetry and final state in neutral dissociation being resolved, and (ii) the cross sections for producing two H(2p) atoms as a function of the incident photon energy. The two experiments are expected to give comprehensive information about the decay dynamics, especially for the decay of the Q_2 doubly excite states of H_2. The development of the experiment (i) was about to finish. However, 2011 T?hoku earthquake unfortunately affected the operation of the KEK-PF ring and thus the study has not completed.
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