Rise and fall of the 4 d sup 10 r arrow 4d sup 9 4f resonance in the Xe isoelectronic sequence

Journal Article · Mon Oct 30 00:00:00 EST 1989 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.63.1934· OSTI ID:5150168

Hansen, J E ^[1]; Brilly, J; Kennedy, E T ^[2]; O'Sullivan, G ^[3]

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1. Zeeman Laboratory, University of Amsterdam, Plantage, Muidergracht 4, NL-1018 TV Amsterdam, The (Netherlands)
2. School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, (Ireland)
3. Physics Department, University College, Belfield, Dublin 4, (Ireland)

The extreme ultraviolet photoabsorption spectrum of a laser-produced lanthanum plasma has been recorded and found to contain a number of discrete features in the 130-eV region. These have been analyzed as 4{ital d}{sup 10}{r arrow}4d{sup 9}nf,{ital np} transitions in La{sup 3+}. We show that the 4{ital f} transition, which is expected to be the strongest, is not in evidence. The reason is that this resonance, after the collapse of the 4{ital f} wave function, has a large autoionization width. We conclude that the 4{ital f} orbital in Ba{sup 2+} is only partially collapsed, which settles a long-standing discussion of this point.

• OSTI ID: 5150168
• Journal Information: Physical Review Letters; (USA), Vol. 63:18; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
LASER-PRODUCED PLASMA
EXTREME ULTRAVIOLET SPECTRA
AUTOIONIZATION
D STATES
EV RANGE 100-1000
F STATES
INNER-SHELL IONIZATION
LANTHANUM
RESONANCE ABSORPTION
WAVE FUNCTIONS
ABSORPTION
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EV RANGE
FUNCTIONS
IONIZATION
METALS
PLASMA
RARE EARTHS
SPECTRA
ULTRAVIOLET SPECTRA
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory