Dynamics of thermoluminescence spectra of impurity– helium condensates containing stabilized nitrogen and oxygen atoms

• Published in: Физика низких температур
• Date: 2012
• Main Authors: Khmelenko, V.V., Krushinskaya, I.N., Boltnev, R.E., Bykhalo, I.B., Pelmenev, A.A., Lee, D.M.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2012
• Subjects: Low Temperature Spectroscopy and Radiation Effects
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/117421
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Dynamics of thermoluminescence spectra of impurity–
 helium condensates containing stabilized nitrogen and
 oxygen atoms / V.V. Khmelenko, I.N. Krushinskaya, R.E. Boltnev, I.B. Bykhalo, A.A. Pelmenev, D.M. Lee // Физика низких температур. — 2012. — Т. 38, № 8. — С. 871-883. — Бібліогр.: 42 назв. — англ.

The results of investigations of thermoluminescence dynamics during destruction of neon–helium and krypton–helium
 condensates containing stabilized nitrogen and oxygen atoms are presented. Spectra of the thermoluminescence
 of a krypton–helium condensate contained bands of N and O atoms and NO molecules. The intensities
 of the bands in these spectra were found to increase simultaneously during destruction processes in the
 temperature range 1.5–15 K. Observation of the NO molecules provides clear evidence for chemical reactions in
 the nanoclusters comprising the sample at low temperatures. Destruction of neon–helium samples occurred in
 two stages. During the first stage the α-group of N atoms surrounded by Ne and N₂ molecules dominated the
 spectra. During the second stage, the spectra contained intense bands of N and O atoms stabilized in a molecular
 nitrogen matrix. The unusual characteristics of the thermoluminescence spectra were observed, and their changes
 were explained in terms of the shell structure of impurity nanoclusters which comprised the impurity–helium
 condensates.