Laser-produced and tokamak spectra of lithiumlike iron, Fe[sup 23+]

Journal Article · Sat Oct 01 04:00:00 EDT 1994 · Journal of the Optical Society of America, Part B: Optical Physics; (United States)

DOI:https://doi.org/10.1364/JOSAB.11.001930· OSTI ID:6702814

Reader, J; Sugar, J; Acquista, N ^[1]; Bahr, R ^[2]

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1. National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
2. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299 (United States)

Spectra of highly ionized iron were generated in a laser-produced plasma and a tokamak. In the spectra from the laser-produced plasma new lines of Fe[sup 23+] were observed that were identified as 3[ital s]--4[ital p], 3[ital p]--4[ital d], and 3[ital d]--4[ital f] transitions. The measured wavelengths of these lines were combined with measurements of the 2[ital s]--2[ital p] resonance lines measured in the tokamak plasma and with earlier measurements of [ital n] = 2 to [ital n] = 3 transitions to yield an improved system of energy levels for Fe[sup 23+]. The measured wavelengths are compared with [ital ab] [ital initio] theoretical values calculated with a Dirac--Fock code. With the 4[ital f] energy levels, which are nearly hydrogenic, an improved ionization energy of 16503000 [plus minus] 1400 cm[sup --1] (2046.11 [plus minus] 0.17 eV) was determined.

• OSTI ID: 6702814
• Journal Information: Journal of the Optical Society of America, Part B: Optical Physics; (United States), Journal Name: Journal of the Optical Society of America, Part B: Optical Physics; (United States) Vol. 11:10; ISSN JOBPDE; ISSN 0740-3224
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY SPECTRA
IONIZING RADIATIONS
IONS
IRON IONS
LASER RADIATION
LASER-PRODUCED PLASMA
PLASMA
RADIATIONS
SPECTRA
ULTRAVIOLET RADIATION
X RADIATION