Low Temperature Physics: 36, 407 (2010); https://doi.org/10.1063/1.3432249 (4 pages)
Физика Низких Температур: Том 36, Выпуск 5 (Май 2010), c. 512-515    ( к оглавлению , назад )

Formation of (Xe2H)* centers in solid Xe via recombination: nonstationary luminescence and «internal electron emission»

E.V. Savchenko1, I.V. Khyzhniy1, S.A. Uyutnov1, G.B. Gumenchuk2, A.N. Ponomaryov2, M.K. Beyer3, and V.E. Bondybey2

1Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., 61103 Kharkov, Ukraine

2Lehrstuhl für Physikalische Chemie II TU München, Lichtenbergstraβe 4, 85747 Garching, Germany

3Institut für Physikalische Chemie Christian-Albrechts-Universität Kiel, Olshausenstraße 40, 24098 Kiel, Germany
E-mail: elena.savchenko.mytum@googlemail.com

Received February 19, 2010

Аннотация

The formation of excimers (Xe2H)* in solid Xe doped with molecular hydrogen under electron beam is studied using the original two-stage technique of nonstationary (NS) cathodoluminescence (CL) in combination with the current activation spectroscopy method — thermally stimulated exoelectron emission (TSEE). Charged species were generated using a high-density electron beam. The species produced were then probed with a lowdensity beam on gradual sample heating. The near UV emission of the (Xe2H)* was used to monitor the neutralization process. It is found that the temperature behavior of the NS CL band of (Xe2H)* clearly correlates with the yield of TSEE measured after identical pre-irradiation of the sample. The fingerprints of the thermally stimulated detrapping of electrons — «internal electron emission» in the spectrum of NS CL point to the essential role of neutralization reaction in the stability of the proton solvated by rare-gas atoms.

PACS: 78.60.Hk Cathodoluminescence, ionoluminescence;
PACS: 78.60.–b Radiative recombination;
PACS: 79.75.+g Exoelectron emission.

Ключевые слова: rare-gas hydride trimers, recombination, cathdoluminescence, thermally stimulated exoelectron emission.