Effect of Electron Capture on Spectral Line Broadening in Hot Dense Plasmas

Gomez, T. A.; Nagayama, T.; Fontes, C. J.; Kilcrease, D. P.; Hansen, S. B.; Zammit, M. C.; Fursa, D. V.; Kadyrov, A. S.; Bray, I.

doi:10.1103/PhysRevLett.124.055003

Effect of Electron Capture on Spectral Line Broadening in Hot Dense Plasmas

Journal Article · Wed Feb 05 00:00:00 EST 2020 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.124.055003· OSTI ID:1618076

^[1]; Nagayama, T. ^[1]; ^[2]; Kilcrease, D. P. ^[2]; Hansen, S. B. ^[1]; Zammit, M. C. ^[2]; ^[3]; ^[3]; Bray, I. ^[3]

Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Curtin Univ., Perth, WA (Australia)

Accurate calculation of spectral line broadening is important for many hot, dense plasma applications. However, calculated line widths have significantly underestimated measured widths for Δn = 0 lines of Li-like ions, which is known as the isolated-line problem. In this Letter, scrutinization of the line-width derivation reveals that the commonly used expression neglects a potentially important contribution from electron-capture. Line-width calculations including this process are performed with two independent codes, both of which removed the discrepancies at temperatures below 10 eV. In conclusion, the revised calculations also suggest the remaining discrepancy scales more strongly with electron temperature than the atomic number as was previously suggested.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: 89233218CNA000001; AC04-94AL85000; NA0003525

OSTI ID:: 1618076

Alternate ID(s):: OSTI ID: 2346078

Report Number(s):: LA-UR--19-30252; SAND--2020-0489J; 682812

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 124; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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