Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Dielectronic resonances of LMn and LNn (? 4) series in highly-charged M-shell tungsten ions

Published

Author(s)

FNU Dipti, A. Borovik, Jr., R. Silwal, Joan M. Dreiling, Amy C. Gall, Endre A. Takacs, Yuri Ralchenko

Abstract

We present accurate spectroscopic measurements and detailed theoretical analysis of inner-shell LM$n$ and LN$n$ ($n$ $\geq$ 4) dielectronic resonances (DR) in highly-charged M-shell ions of tungsten. The x-ray emission from W$^49+}$ through W$^64+}$ was recorded at the electron beam ion trap (EBIT) facility at the National Institute of Standards and Technology (NIST) with a high-purity Ge detector for electron beam energies between 6.8 keV and 10.8 keV. The measured spectra clearly show the presence of strong resonance features as well as direct excitation spectral lines. The analysis of the recorded spectra with large-scale collisional-radiative (CR) modeling of the EBIT plasma allowed us to unambiguously identify numerous dielectronic resonances associated with excitations of the inner-shell $2s_1⁄2$, $2p_1⁄2$, and $2p_3/2}$ electrons. We also discuss different modeling strategies, importance of particular atomic processes for production of resonances, and future measurements with a new generation of microcalorimeters.
Citation
Physical Review A
Volume
101

Keywords

Spectroscopy, Dielectronic resonances, Collisional-radiative modeling, M-shell ions.

Citation

Dipti, F. and Borovik, A. (2020), Dielectronic resonances of LMn and LNn (? 4) series in highly-charged M-shell tungsten ions, Physical Review A, [online], https://doi.org/10.1103/PhysRevA.101.032503, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928431 (Accessed January 23, 2022)
Created March 4, 2020, Updated May 3, 2021