Fizika Nizkikh Temperatur: Volume 45, Number 9 (September 2019), p. 1144-1157 ( to contents , go back )
New trends in spectroscopy of solid nitrogen (Topical Review)
E. Savchenko1, I. Khyzhniy1, and V. Bondybey2
1B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Nauki Ave., Kharkiv 61103, Ukraine
2Lehrstuhl für Physikalische Chemie TUM, Garching b. München 85747, Germany
Received June 12, 2019, published online July 26, 2019
This topical review presents new trends in emission spectroscopy of solid nitrogen. Developed approach to study of charged centers and their role in radiation-induced phenomena as well as relaxation processes is discussed. The emission spectroscopy elaborated incorporates correlated in real time detection of several relaxation emission — optical photons, electrons and emission of particles. Key details of this approach applied in research of pre-irradiated by electron beam solid nitrogen and nitrogen–helium nanoclusters grown by a gas jet condensation technique are given. New methods — nonstationary luminescence and nonstationary desorption, designed to study ion-electron recombination reactions — are briefly presented. The selected recent results obtained employing this approach and emission spectroscopy techniques to study the charge related phenomena in condensed nitrogen are summarized. Main attention is given to detection of polyatomic ionic centers containing four and three nitrogen atoms: N4+,N3+, N3̅. − Their part played in radiation-induced phenomena and relaxation processes, in particular desorption, is discussed.
Key words: solid nitrogen, nitrogen anions and cations, recombination reactions, neutralization, tetranitrogen, desorption.