TY - JOUR
T1 - Comparisons of laboratory wavelength measurements with theoretical calculations for neon-like through lithium-like argon, sulfur and silicon
AU - Lepson, J. K.
AU - Beiersdorfer, P.
AU - Behar, E.
AU - Kahn, S. M.
N1 - Funding Information:
This work was supported by NASA Space Astrophysics Research and Analysis work order W-19,878 and was performed under the auspices of the US Department of Energy by the University of California Lawrence Livermore National Laboratory under contract W-7405-ENG-48.
PY - 2005/7
Y1 - 2005/7
N2 - Atomic structure codes have a difficult time accurately calculating the wavelengths of many-electron ions without the benefit of laboratory measurements. This is especially true for wavelengths of lines in the extreme ultraviolet and soft X-ray regions. We are using the low-energy capability of the Livermore electron beam ion traps to compile a comprehensive catalog of astrophysically relevant emission lines in support of satellite X-ray observations. Our database includes wavelength measurements, relative intensities and line assignments, and is compared to a full set of calculations using the Hebrew University - Lawrence Livermore Atomic Code (HULLAC). Mean deviation of HULLAC calculations from our measured wavelength values is is highest for L-shell transitions of neon-like ions and lowest for lithium-like ions, ranging from a mean deviation of over 500 m Å for Si V to 12 mÅ in Ar XVI.
AB - Atomic structure codes have a difficult time accurately calculating the wavelengths of many-electron ions without the benefit of laboratory measurements. This is especially true for wavelengths of lines in the extreme ultraviolet and soft X-ray regions. We are using the low-energy capability of the Livermore electron beam ion traps to compile a comprehensive catalog of astrophysically relevant emission lines in support of satellite X-ray observations. Our database includes wavelength measurements, relative intensities and line assignments, and is compared to a full set of calculations using the Hebrew University - Lawrence Livermore Atomic Code (HULLAC). Mean deviation of HULLAC calculations from our measured wavelength values is is highest for L-shell transitions of neon-like ions and lowest for lithium-like ions, ranging from a mean deviation of over 500 m Å for Si V to 12 mÅ in Ar XVI.
KW - EUV lines
KW - Electron beam ion trap
KW - Emission spectra
KW - HULLAC
UR - http://www.scopus.com/inward/record.url?scp=20144384766&partnerID=8YFLogxK
U2 - 10.1016/j.nimb.2005.03.159
DO - 10.1016/j.nimb.2005.03.159
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AN - SCOPUS:20144384766
SN - 0168-583X
VL - 235
SP - 131
EP - 134
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - 1-4
T2 - The Physics of Highly Charged Ions Proceedings of the Twelfth International Conference on the Physics of Highly Charged Ions (HCI-2004)
Y2 - 6 September 2004 through 11 September 2004
ER -