`CLOSED DISSOCIATIVE CHANNEL' EFFECT ON THE DISSOCIATIVE EXCITATION AND
BRANCHING IN THE DISSOCIATIVE RECOMBINATION OF H$_2^+$
Hidekazu Takagi
Physics Laboratory, School of medicine, Kitasato University
The importance of the `closed dissociative channel' (CDC) is stressed on
the dissociative recombination (DR) and 
dissociative excitation (DE).  Result of calculation based on the
multichannel quantum defect theory including 
CDC is shown for H$_2^+$. The DE cross section sensitively depends on
initial vibrational state.
The principal quantum number distribution of the fragment atom in the DR is
also shown.