Electron excitation of the singlet-g states of H2

The optical method and time-resolved spectroscopy have been used to study the electron impact excitation of the G 1Σ+/sub g/(v'=0,1,2,3) and I 1Pi/sub g/(v'=0) Rydberg states and the K 1Σ+/sub g/(v'=0,1,2), M 1Σ+/sub g/(v'=0), and N 1Σ+/sub g/(v'=1,2) doubly excited states of the H2 molecule. Emission cross section measurements in the range 0.2 to 3.3 x 10-20 cm2 and radiative lifetime measurements in the range approx.21 to 70 ns are obtained at 50 eV incident electron energy and approx.30 mTorr H2 gas pressure. In addition, H2--H2* quenching rate data are obtained for several rovibronic levels of the singlet-g states over the pressure range approx.10 to 400 mTorr