Threshold truncation of a giant dipole resonance in photoionization of Ti3+

Autor:	Erik D. Emmons, Alfred Müller, R. A. Phaneuf, Ignacio Alvarez, M. F. Gharaibeh, S W J Scully, Carmen Cisneros, Alfred S. Schlachter, T van Zoest, G. Hinojosa, Stefan Schippers
Rok vydání:	2004
Předmět:	Physics Dipole Giant resonance Ionization Above threshold ionization Photoionization mode Photoionization Photon energy Atomic physics Condensed Matter Physics Resonance (particle physics) Atomic and Molecular Physics and Optics
Zdroj:	Journal of Physics B: Atomic, Molecular and Optical Physics. 37:L209-L216
ISSN:	1361-6455 0953-4075
Popis:	Photoionization of triply charged titanium ions was investigated using the merged photon–ion beam technique at a synchrotron light source. The experimental photon energy range 42.6–49.4 eV encompasses the threshold for the photoionization of Ti3+(3p6 3d2 D3/2) ground-state ions at 43.267 eV. Prominent resonance features due to 3p → 3d and 3p → 4s excitations are observed with the strongest one being the 'giant' 3p5(3d23F)2F dipole resonance which has a width of 1.5 eV. Since it is located only 0.2 eV above the ionization threshold a cut-off of this resonance is observed in photoionization. By employing the principle of detailed balance the results are compared with an earlier experimental study of the time-reversed Ti4+ photorecombination. The comparison clarifies the giant resonance's role in photorecombination and yields state-selective photoionization and photorecombinaton cross sections on an absolute scale.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0ebd038aad9a2038f17f0170d1c98c0d https://doi.org/10.1088/0953-4075/37/10/l02 Zobrazit plný text záznamu