Accurate modeling of benchmark x-ray spectra from highly charged ions of tungsten

Journal Article · Sun Oct 15 04:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.042514· OSTI ID:20857876

Ralchenko, Yuri; Tan, Joseph N; Gillaspy, J D; Pomeroy, Joshua M; Silver, Eric ^[1]

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1. Atomic Physics Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8422 (United States)

We present detailed collisional-radiative modeling for a benchmark x-ray spectrum of highly charged tungsten ions in the range between 3 and 10 A ring produced in an electron beam ion trap (EBIT) with a beam energy of 4.08 keV. Remarkably good agreement between calculated and measured spectra was obtained without adjustable parameters, highlighting the well-controlled experimental conditions and the sophistication of the kinetic simulation of the non-Maxwellian tungsten plasma. This agreement permitted the identification of spectral lines from Cu-like W{sup 45+} and Ni-like W{sup 46+} ions, led to the reinterpretation of a previously known line in Ni-like ion as an overlap of electric-quadrupole and magnetic-octupole lines, and revealed subtle features in the x-ray spectrum arising from the dominance of forbidden transitions between excited states. The importance of level population mechanisms specific to the EBIT plasma is discussed as well.

• OSTI ID: 20857876
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 74; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
74 ATOMIC AND MOLECULAR PHYSICS
BENCHMARKS
CATIONS
ELECTRON BEAMS
EMISSION SPECTRA
EXCITED STATES
FORBIDDEN TRANSITIONS
ION COLLISIONS
KEV RANGE
OCTUPOLES
PLASMA
PLASMA DIAGNOSTICS
PLASMA SIMULATION
QUADRUPOLES
TRAPS
TUNGSTEN
TUNGSTEN IONS
X-RAY SPECTRA