Desorption of excited molecules from solid nitrogen
  The role of charged centers in radiation-induced phenomena occurring in solid nitrogen irradiated with an electron beam was studied. The experiments were performed employing luminescence method and activation spectroscopy techniques - spectrally resolved thermally stimulated luminescence TSL and thermally stimulated exoelectron emission. To discriminate radiation-induced processes in the bulk and at the surface the samples were probed in depth by varying electron energy. Desorption of excited N2* (C3{\Pi}u) molecule was detected for the first time. The mechanism of this phenomenon based on recombination of electron with intrinsic charged center N4+ was proposed. The key role of N3+ center dissociative recombination in generation of N radicals is suggested. 
Elena Savchenko, Ivan Khyzhniy, Sergey Uyutnov, Andrey Barabashov,   Galina Gumenchuk, Alexey Ponomaryov, and Vladimir Bondybey
cond-mat.mtrl-sci