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

Petkov, E. E.; Safronova, A. S.; Kantsyrev, V. L.; Stafford, A.; Safronova, U. I.; Shlyaptseva, V. V.; Beiersdorfer, P.; Hell, N.; Brown, G. V.

doi:10.1088/1361-6455/ab38e6

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

Journal Article · Tue Sep 10 00:00:00 EDT 2019 · Journal of Physics. B, Atomic, Molecular and Optical Physics

DOI:https://doi.org/10.1088/1361-6455/ab38e6· OSTI ID:1592038

^[1]; Safronova, A. S. ^[2]; Kantsyrev, V. L. ^[2]; Stafford, A. ^[2]; Safronova, U. I. ^[2]; Shlyaptseva, V. V. ^[2]; Beiersdorfer, P. ^[3]; Hell, N. ^[3]; Brown, G. V. ^[3]

Naval Research Lab., Washington, D.C. (United States)
Univ. of Nevada, Reno, NV (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

We present polarization measurements of the $$2{{\rm{p}}}^{5}3{\rm{d}}$$ ¹ P ₁ → 2p^{6 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 → 2p^{6 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 → 2p^{6 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.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344; NA0002954; NA0003877

OSTI ID:: 1592038

Report Number(s):: LLNL-JRNL-787097; 982589; TRN: US2101992

Journal Information:: Journal of Physics. B, Atomic, Molecular and Optical Physics, Vol. 52, Issue 19; ISSN 0953-4075

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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