Absolute measurements of optical oscillator strengths of noble-gas resonance lines

Journal Article · Fri Dec 01 04:00:00 EST 1995 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.52.4451· OSTI ID:147819

Gibson, N D; Risley, J S ^[1]

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1. North Carolina State University, Raleigh, North Carolina 27695 (United States)

We have remeasured the optical oscillator strengths of eight noble-gas resonance lines in the vacuum-ultraviolet region. The measurements use a 900-eV collimated electron beam to excite the atoms, and the transmission of the emitted radiation is measured as a function of the gas density. In the method of self-absorption used here, the measured oscillator strengths are proportional to the distance between the electron beam and the fixed aperture of the spectrometer-detector system. We investigated and eliminated a possible systematic effect in the determination of the absorption length due to deflections of the electron beam. These measurements are performed at higher energies than our previous experiments at 100 eV in order to keep the electron-beam path better defined and aligned with the electron-gun apertures. The measured absolute oscillator strengths are He I (58.4 nm), 0.2700{plus_minus}0.0076 (2.8%); He I (53.7 nm), 0.0737{plus_minus}0.0023 (3.1%); Ne I (74.4 nm), 0.010 95{plus_minus}0.000 32 (2.9%); Ne I (73.6 nm), 0.1432{plus_minus}0.0038 (2.6%); Ar I (106.7 nm), 0.0580{plus_minus}0.0017 (2.9%); Ar I (104.8 nm), 0.2214{plus_minus}0.0068 (3.1%); Kr I (123.6 nm), 0.1775{plus_minus}0.0050 (2.8%); and Kr I (116.5 nm), 0.1416{plus_minus}0.0041 (2.9%).

• OSTI ID: 147819
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 52; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ARGON
ELECTRON BEAMS
EV RANGE 100-1000
EXTREME ULTRAVIOLET SPECTRA
HELIUM
KRYPTON
NEON
OSCILLATOR STRENGTHS
RARE GASES
RESONANCE