Measurements of pressure-induced $Kβ$ line shifts in ramp compressed cobalt up to 8 Mbar

Jiang, S.; Lazicki, A. E.; Hansen, S. B.; Sterne, P. A.; Grabowski, P.; Shepherd, R.; Scott, H. A.; Smith, R. F.; Eggert, J. H.; Ping, Y.

doi:10.1103/physreve.101.023204

Measurements of pressure-induced $Kβ$ line shifts in ramp compressed cobalt up to 8 Mbar

Journal Article · Fri Feb 14 00:00:00 EST 2020 · Physical Review E

DOI:https://doi.org/10.1103/physreve.101.023204· OSTI ID:1664651

^[1]; Lazicki, A. E. ^[1]; Hansen, S. B. ^[2]; Sterne, P. A. ^[1]; Grabowski, P. ^[1]; Shepherd, R. ^[1]; ^[1]; Smith, R. F. ^[1]; Eggert, J. H. ^[1]; Ping, Y. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Here we report measurements of

K

-shell fluorescence lines induced by fast electrons in ramp-compressed Co targets. The fluorescence emission was stimulated by fast electrons generated through short-pulse laser-solid interaction with an Al target layer. Compression up to

2.1 \times

solid density was achieved while maintaining temperatures well below the Fermi energy, effectively removing the thermal effects from consideration. We observed small but unambiguous redshifts in the

K β

fluorescence line relative to unshifted Cu

K α

. Redshifts up to 2.6 eV were found to increase with compression and to be consistent with predictions from self-consistent models based on density-functional theory.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (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:: AC04-94AL85000; AC52-07NA27344; NA0003525

OSTI ID:: 1664651

Alternate ID(s):: OSTI ID: 1810366
OSTI ID: 1599674

Report Number(s):: LLNL-JRNL--813801; SAND--2021-7749J; 1021997

Journal Information:: Physical Review E, Journal Name: Physical Review E Journal Issue: 2 Vol. 101; ISSN 2470-0045

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Measurements of pressure-induced $Kβ$ line shifts in ramp compressed cobalt up to 8 Mbar

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