DOUBLY EXCITED STATES OF MOLECULAR NITROGEN 
AS STUDIED BY COINCIDENT ELECTRON-ENERGY-LOSS SPECTROSCOPY

Takeshi Odagiri, Kazuhiro Yoshikawa, Noriyuki Kouchi and Yoshihiko Hatano

Dept. of Chemistry, Tokyo Institute of Technology,
Meguro-ku, Tokyo 152-8551, Japan

The coincident and ordinary electron-energy-loss spectra of N$_2$ 
have been measured in the energy loss range of doubly excited states 
at an incident energy of 80eV and a scattering angle of 2\degree.
The ordinary spectrum shows rich structures in the energy loss range of
20--35eV.
The intensity ratio of the coincident spectrum to the ordinary one 
gives the branching ratio of N$^{\ast}$ formation 
from the doubly excited states.