Prompt and delayed secondary excitons in rare gas solids

• Дата: 2003
• Автори: Kirm, M., Kisand, V., Sombrowski, E., Steeg, B., Vielhauer, S., Zimmerer, G.
• Формат: Стаття
• Мова: English
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2003
• Назва видання: Физика низких температур
• Теми: Spectroscopy in Cryocrystals and Matrices
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/128934
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Prompt and delayed secondary excitons in rare gas solids / M. Kirm, V. Kisand, E. Sombrowski, B. Steeg, S. Vielhauer, G. Zimmerer // Физика низких температур. — 2003. — Т. 29, № 9-10. — С. 1081-1092. — Бібліогр.: 38 назв. — англ.

Direct and indirect creation of excitons in rare gas solids has been investigated with reflectivity and luminescence spectroscopy. For the heavy rare gas solids Kr and Xe, new and more reliable exciton parameters have been deduced. With time-resolved luminescence spectroscopy, fast and delayed secondary-exciton creation has been established and separated. Thermalization of photocarriers and their delayed recombination have been analyzed, including a first attempt to investigate the influence of excitation density on the carrier dynamics. The existence of excitonic side bands of ionization limits Ei (either band gap or inner-shell ionization limits) in prompt secondary exciton creation has been established. The threshold energies of these side bands are given by Eth≈Ei nEex (n is integer, Eex is exciton energy). The side bands are ascribed to the formation of electronic polaron complexes, superimposed to inelastic scattering of photoelectrons.