Uncertainties in Atomic Data for Modeling Astrophysical Charge Exchange Plasmas

Gu, Liyi; Shah, Chintan; Zhang, Ruitian

doi:10.3390/s22030752

Title: Uncertainties in Atomic Data for Modeling Astrophysical Charge Exchange Plasmas

Journal Article · 19 January 2022 · Sensors

DOI: https://doi.org/10.3390/s22030752 · OSTI ID:2471169

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SRON Netherlands Institute for Space Research, Leiden (Netherlands); RIKEN High Energy Astrophysics Laboratory, Saitama (Japan)
NASA Goddard Space Flight Center, Greenbelt, MD (United States); Max-Planck-Institut fǜr Kernphysik, Heidelberg (Germany); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Chinese Academy of Sciences, Lanzhou (China); University of Chinese Academy of Sciences, Beijing (China)

Relevant uncertainties of theoretical atomic data are vital to determining the accuracy of plasma diagnostics in a number of areas, including, in particular, the astrophysical study. We present a new calculation of the uncertainties on the present theoretical ion-impact charge exchange atomic data and X-ray spectra, based on a set of comparisons with the existing laboratory data obtained in historical merged-beam, cold-target recoil-ion momentum spectroscopy, and electron beam ion traps experiments. The average systematic uncertainties are found to be 35–88% on the total cross sections, and 57–75% on the characteristic line ratios. The model deviation increases as the collision energy decreases. The errors on total cross sections further induce a significant uncertainty to the calculation of ionization balance for low-temperature collisional plasmas. Substantial improvements of the atomic database and dedicated laboratory measurements are needed to obtain the current models, ready for the X-ray spectra from the next X-ray spectroscopic mission.

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

Sponsoring Organization:: USDOE; European Union’s Horizon 2020 Programme

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 2471169

Journal Information:: Sensors, Journal Name: Sensors Journal Issue: 3 Vol. 22; ISSN 1424-8220

Publisher:: MDPI AGCopyright Statement

Country of Publication:: United States

Language:: English

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
X-ray astrophysics
atomic data
charge exchange
chemistry
engineering
instruments & instrumentation
plasma diagnostics

Title: Uncertainties in Atomic Data for Modeling Astrophysical Charge Exchange Plasmas

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References (80)

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