H. Shi et al., LOW-ENERGY-ELECTRON STIMULATED DESORPTION OF METASTABLE PARTICLES FROM CONDENSED N-2 AND CO, Physical review. B, Condensed matter, 52(7), 1995, pp. 5385-5391
The impact of low-energy electrons (7-19 eV, Delta E=60 meV) is found
to induce desorption of metastable particles (N-2 and CO*) from conde
nsed multilayer N-2 and CO films. For N-2 films, the yield function of
the metastable-particle signal, which shows two regions (below and ab
ove 11 eV) of large intensity difference, is assigned to excitations t
o the valence state B3IIg and to the Rydberg state E(3) Sigma(g)(+), r
espectively. Desorption of N-2 above 11 eV is believed to be due to t
he repulsive interaction between the excited molecules and the solid s
urface. The desorp,tion yield of CO, which is much weaker than that f
or ,,is discussed in terms of vibrational energy transfer from the vib
rational excited a'(3) Sigma(+) state.