Absolute single photoionization cross-section measurements of Se3+and Se5+

Autor:	R. A. Phaneuf, E C Red, Alex Aguilar, N. C. Sterling, A. L. D. Kilcoyne, D. A. Esteves, René C. Bilodeau
Rok vydání:	2012
Předmět:	Physics Quantum defect Ionization Metastability Synchrotron radiation Photoionization Photon energy Atomic physics Condensed Matter Physics Ground state Atomic and Molecular Physics and Optics Ion
Zdroj:	Journal of Physics B: Atomic, Molecular and Optical Physics. 45:115201
ISSN:	1361-6455 0953-4075
DOI:	10.1088/0953-4075/45/11/115201
Popis:	Absolute single photoionization cross-section measurements of Se3+ and Se5+ ions were performed using monochromatized synchrotron radiation and the photo-ion merged-beams technique. Se3 + measurements were made at a photon energy resolution of 20 ± 3 meV from 41.90 to 54.56 eV, spanning the 2P1/2 ground state ionization threshold. Numerous autoionizing resonances arising from both the 2P1/2 ground state and 2P3/2 metastable state are identified using quantum defect analysis. For Se5 +, measurements were made at a photon energy resolution of 60 ± 10 meV from 81 to 101 eV, spanning the 2S1/2 ground state ionization threshold, and at a photon energy resolution of 28 ± 3 meV from 100.175 to 106.675 eV in a region rich with autoionizing resonances. The direct ionization threshold of the Se5 + 2S1/2 ground state is experimentally determined to be 81.780 ± 0.010 eV.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d3daf88a30cd229b2eb247086b192fa0 https://doi.org/10.1088/0953-4075/45/11/115201 Zobrazit plný text záznamu