Low Temperature Physics: 39, 451 (2013); https://doi.org/10.1063/1.4807150 (5 pages)
Физика Низких Температур: Том 39, Выпуск 5 (Май 2013), c. 580-585    ( к оглавлению , назад )

Comparative study of thermostimulated luminescence and electron emission of nitrogen nanoclusters and films

R.E. Boltnev1, I.B. Bykhalo1, I.N. Krushinskaya1, A.A. Pelmenev1, V.V. Khmelenko2, D.M. Lee2, I.V. Khyzhniy3, S.A. Uyutnov3, E.V. Savchenko3

A.N. Ponomaryov4, G.B. Gumenchuk5, and V.E. Bondybey5

1Branch of Institute of Energy Problems of Chemical Physics RAS, Chernogolovka 142432, Russia
E-mail: boltnev@gmail.com

2Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USA

3B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine

4Helmholtz Zentrum Dresden-Rossendorf, Dresden 01328, Germany

5Lehrstuhl für Physikalische Chemie II TUM, Garching b. München 85747, Germany

Received December 5, 2012

Аннотация

We have studied thermostimulated luminenscence and electron emission of nitrogen films and nanoclusters containing atomic nitrogen free radicals. Thermostimulated electron emission from N2 nanoclusters was observed for the first time. Thermostimulated luminescence spectra obtained during N2–He sample destruction are similar to those detected from N2 films preirradiated by an electron beam. This similarity reveals common mechanisms of energy transfer and relaxation. The correlation of the luminescence intensity and the electron current in both systems points to the important role of ionic species in relaxation cascades. A sublimation of solid helium shells isolating nitrogen nanoclusters is a trigger for the initiation of thermostimulated luminescence and electron emission in these nitrogen–helium condensates.

PACS: 78.60.Kn Thermoluminescence;
PACS: 79.75.+g Exoelectron emission.

Ключевые слова: solid helium, cryogenic electrolytes, ion dipole gas, phonon spectrum.