Low Temperature Physics: 33, 529 (2007); https://doi.org/10.1063/1.2746244 (3 pages)
Thermally stimulated exoelectron emission from solid Xe
I.V. Khyzhniy1, O.N. Grigorashchenko1, A.N. Ponomaryov2, E.V. Savchenko1, and V.E. Bondybey2
1B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
2Lehrstuhl für Physikalische Chemie II TU München, 4 Lichtenbergstraße, Garching 85747, Germany
Received November 20, 2006
Thermally-stimulated emission of exoelectrons and photons from solid Xe pre-irradiated by low-energy electrons were studied. A high sensitivity of thermally-stimulated luminescence (TSL) and thermally-stimulated exoelectron emission (TSEE) to sample prehistory was demonstrated. It was shown that electron traps in unannealed samples are characterized by a much broader distribution of trap levels in comparison with annealed samples and their concentration exceeds in number that in annealed samples. Both phenomena, TSL and TSEE, were found to be triggered by release of electrons from the same kind of traps. The data obtained suggest a competition between two relaxation channels: charge recombination and electron transport terminated by TSL and TSEE. It was found that TSEE predominates at low temperatures while at higher temperatures TSL prevails. An additional relaxation channel, a photon-stimulated exoelectron emission from pre-irradiated solid Xe, was revealed.
PACS: 78.60.Kn Thermoluminescence;
Key words: rare gas solids, thermally stimulated luminescence, exoelectron emission, relaxation processes.