小田切 丈

The electron energy-loss spectra of Hz have been measured in coincidence with the neutral dissociation leading to H(1s)+H(2p) near the first ionization potential at the electron impact energy of 150 eV and the scattering angles of 2 degrees and 10 degrees, and compared with ordinary electron energy-loss spectra The two spectra, the coincident and the ordinary ones, are similar to each other in shape below the energy level of H-2(+)(X(2) Sigma(g)(+), v(i) = 1), white they are different from each other above this energy level. Such a large change around v(i) = 1 is discussed in terms of the dynamics of superexcited hydrogen molecules, and the availability of this method for such studies is examined.