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Title: Polarization measurements of Ne-like Mo32+ x-ray lines excited by an electron beam

Abstract

We present polarization measurements of the $$2{{\rm{p}}}^{5}3{\rm{d}}$$ 1 P 1 → 2p6 1 S 0 resonance line of Ne-like Mo32+, commonly known as 3C, as well as the $$2{{\rm{p}}}^{5}3{\rm{d}}$$ 3 D 1 → 2p6 1 S 0 intercombination line, commonly known as 3D, as a function of the electron impact energy ranging from near threshold to 6 times threshold (2.75–15 keV). In addition, the x-ray line polarization of the $$2{{\rm{p}}}^{5}3{\rm{p}}$$ 3 D 2 → 2p6 1 S 0 electric quadrupole forbidden line was measured at 3 and 4 keV. Excitation of these lines was achieved with the LLNL EBIT-I electron beam ion trap. The degree of polarization of the emission lines was derived by comparing spectra recorded with a flat Ge (111) crystal spectrometer, which is sensitive to polarization, to the spectra recorded by an x-ray calorimeter, which is insensitive to polarization. Here, the experimental measurements were compared to theoretical predictions produced using the Flexible Atomic Code, and good agreement was found.

Authors:
ORCiD logo [1];  [2];  [2];  [2];  [2];  [2];  [3];  [3];  [3]
  1. Naval Research Lab., Washington, D.C. (United States)
  2. Univ. of Nevada, Reno, NV (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1592038
Report Number(s):
LLNL-JRNL-787097
Journal ID: ISSN 0953-4075; 982589; TRN: US2101992
Grant/Contract Number:  
AC52-07NA27344; NA0002954; NA0003877
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. B, Atomic, Molecular and Optical Physics
Additional Journal Information:
Journal Volume: 52; Journal Issue: 19; Journal ID: ISSN 0953-4075
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; spectroscopy; atomic physics; polarization; electron beam ion trap

Citation Formats

Petkov, E. E., Safronova, A. S., Kantsyrev, V. L., Stafford, A., Safronova, U. I., Shlyaptseva, V. V., Beiersdorfer, P., Hell, N., and Brown, G. V. Polarization measurements of Ne-like Mo32+ x-ray lines excited by an electron beam. United States: N. p., 2019. Web. https://doi.org/10.1088/1361-6455/ab38e6.
Petkov, E. E., Safronova, A. S., Kantsyrev, V. L., Stafford, A., Safronova, U. I., Shlyaptseva, V. V., Beiersdorfer, P., Hell, N., & Brown, G. V. Polarization measurements of Ne-like Mo32+ x-ray lines excited by an electron beam. United States. https://doi.org/10.1088/1361-6455/ab38e6
Petkov, E. E., Safronova, A. S., Kantsyrev, V. L., Stafford, A., Safronova, U. I., Shlyaptseva, V. V., Beiersdorfer, P., Hell, N., and Brown, G. V. Tue . "Polarization measurements of Ne-like Mo32+ x-ray lines excited by an electron beam". United States. https://doi.org/10.1088/1361-6455/ab38e6. https://www.osti.gov/servlets/purl/1592038.
@article{osti_1592038,
title = {Polarization measurements of Ne-like Mo32+ x-ray lines excited by an electron beam},
author = {Petkov, E. E. and Safronova, A. S. and Kantsyrev, V. L. and Stafford, A. and Safronova, U. I. and Shlyaptseva, V. V. and Beiersdorfer, P. and Hell, N. and Brown, G. V.},
abstractNote = {We present polarization measurements of the $2{{\rm{p}}}^{5}3{\rm{d}}$ 1 P 1 → 2p6 1 S 0 resonance line of Ne-like Mo32+, commonly known as 3C, as well as the $2{{\rm{p}}}^{5}3{\rm{d}}$ 3 D 1 → 2p6 1 S 0 intercombination line, commonly known as 3D, as a function of the electron impact energy ranging from near threshold to 6 times threshold (2.75–15 keV). In addition, the x-ray line polarization of the $2{{\rm{p}}}^{5}3{\rm{p}}$ 3 D 2 → 2p6 1 S 0 electric quadrupole forbidden line was measured at 3 and 4 keV. Excitation of these lines was achieved with the LLNL EBIT-I electron beam ion trap. The degree of polarization of the emission lines was derived by comparing spectra recorded with a flat Ge (111) crystal spectrometer, which is sensitive to polarization, to the spectra recorded by an x-ray calorimeter, which is insensitive to polarization. Here, the experimental measurements were compared to theoretical predictions produced using the Flexible Atomic Code, and good agreement was found.},
doi = {10.1088/1361-6455/ab38e6},
journal = {Journal of Physics. B, Atomic, Molecular and Optical Physics},
number = 19,
volume = 52,
place = {United States},
year = {2019},
month = {9}
}

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