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Title: Vanishing resonances and excited populations: The 4d photoabsorption spectrum of Xe-like La{sup 3+} and I-like La{sup 4+}

Abstract

The photoabsorption spectrum of Xe-like La{sup 3+} and I-like La{sup 4+} has been obtained in the extreme ultraviolet (euv) spectral region with the dual laser produced plasma technique. Photoexcitation from the 4d subshell is the dominant process in the 80-150 eV energy range. Strong discrete structure, corresponding to 4d{yields}np, mf (n>6, m>4) transitions in La{sup 3+} was observed at lower laser power densities, but with increasing laser flux the discrete features were suppressed and replaced by broad features in the 4d{yields}5p and 4d{yields}4f regions. This behavior can be attributed to the presence of absorption from excited states containing open 5p and 4f subshells in La{sup 3+} and the onset of similar absorption in La{sup 4+}.

Authors:
; ; ;  [1]
  1. School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland)
Publication Date:
OSTI Identifier:
20982306
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 75; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.75.032509; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ABSORPTION; CATIONS; EV RANGE; EXCITATION; EXCITED STATES; EXTREME ULTRAVIOLET RADIATION; LANTHANUM; LANTHANUM IONS; LASER-PRODUCED PLASMA; MULTICHARGED IONS; PHOTON-ATOM COLLISIONS; POWER DENSITY; RESONANCE

Citation Formats

Murphy, N., Cummings, A., Dunne, P., and O'Sullivan, G.. Vanishing resonances and excited populations: The 4d photoabsorption spectrum of Xe-like La{sup 3+} and I-like La{sup 4+}. United States: N. p., 2007. Web. doi:10.1103/PHYSREVA.75.032509.
Murphy, N., Cummings, A., Dunne, P., & O'Sullivan, G.. Vanishing resonances and excited populations: The 4d photoabsorption spectrum of Xe-like La{sup 3+} and I-like La{sup 4+}. United States. doi:10.1103/PHYSREVA.75.032509.
Murphy, N., Cummings, A., Dunne, P., and O'Sullivan, G.. Thu . "Vanishing resonances and excited populations: The 4d photoabsorption spectrum of Xe-like La{sup 3+} and I-like La{sup 4+}". United States. doi:10.1103/PHYSREVA.75.032509.
@article{osti_20982306,
title = {Vanishing resonances and excited populations: The 4d photoabsorption spectrum of Xe-like La{sup 3+} and I-like La{sup 4+}},
author = {Murphy, N. and Cummings, A. and Dunne, P. and O'Sullivan, G.},
abstractNote = {The photoabsorption spectrum of Xe-like La{sup 3+} and I-like La{sup 4+} has been obtained in the extreme ultraviolet (euv) spectral region with the dual laser produced plasma technique. Photoexcitation from the 4d subshell is the dominant process in the 80-150 eV energy range. Strong discrete structure, corresponding to 4d{yields}np, mf (n>6, m>4) transitions in La{sup 3+} was observed at lower laser power densities, but with increasing laser flux the discrete features were suppressed and replaced by broad features in the 4d{yields}5p and 4d{yields}4f regions. This behavior can be attributed to the presence of absorption from excited states containing open 5p and 4f subshells in La{sup 3+} and the onset of similar absorption in La{sup 4+}.},
doi = {10.1103/PHYSREVA.75.032509},
journal = {Physical Review. A},
number = 3,
volume = 75,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}