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Title: Core Electrons in the Electronic Stopping of Heavy Ions

Abstract

Electronic stopping power in the keV / Å range is accurately measured from first principles for high atomic-number projectiles and the effect of core states is carefully assessed. The energy loss to electrons in self-irradiated nickel is researched using real-time time-dependent density functional theory. Different core states are explicitly included in the simulations to understand their involvement in the dissipation mechanism. The core electrons of the projectile are found to open additional dissipation channels as the projectile velocity increases. Almost all of the energy loss is accounted for, even for high projectile velocities, when core electrons as deep as 2s22p6 are explicitly treated. In addition to their expected excitation at high velocities, a flapping dynamical response of the projectile core electrons is observed at intermediate velocities. The empirical reference data are well reproduced in the projectile velocity range of 1.0–12.0 a.u. (1.5–210 MeV).

Authors:
 [1];  [2];  [3]
  1. nanoGUNE Cooperative Research Center (CIC), Donostia-San Sebastián (Spain)
  2. Univ. of Cambridge (United Kingdom); nanoGUNE Cooperative Research Center (CIC), Donostia-San Sebastián (Spain)
  3. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1526868
Alternate Identifier(s):
OSTI ID: 1469416
Report Number(s):
LLNL-JRNL-749368
Journal ID: ISSN 0031-9007; PRLTAO; 900445
Grant/Contract Number:  
AC52-07NA27344; FIS2015-64886; FIS2012-37549; BES-2013-063728
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 121; Journal Issue: 11; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Ullah, Rafi, Artacho, Emilio, and Correa, Alfredo A. Core Electrons in the Electronic Stopping of Heavy Ions. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.121.116401.
Ullah, Rafi, Artacho, Emilio, & Correa, Alfredo A. Core Electrons in the Electronic Stopping of Heavy Ions. United States. https://doi.org/10.1103/PhysRevLett.121.116401
Ullah, Rafi, Artacho, Emilio, and Correa, Alfredo A. Tue . "Core Electrons in the Electronic Stopping of Heavy Ions". United States. https://doi.org/10.1103/PhysRevLett.121.116401. https://www.osti.gov/servlets/purl/1526868.
@article{osti_1526868,
title = {Core Electrons in the Electronic Stopping of Heavy Ions},
author = {Ullah, Rafi and Artacho, Emilio and Correa, Alfredo A.},
abstractNote = {Electronic stopping power in the keV / Å range is accurately measured from first principles for high atomic-number projectiles and the effect of core states is carefully assessed. The energy loss to electrons in self-irradiated nickel is researched using real-time time-dependent density functional theory. Different core states are explicitly included in the simulations to understand their involvement in the dissipation mechanism. The core electrons of the projectile are found to open additional dissipation channels as the projectile velocity increases. Almost all of the energy loss is accounted for, even for high projectile velocities, when core electrons as deep as 2s22p6 are explicitly treated. In addition to their expected excitation at high velocities, a flapping dynamical response of the projectile core electrons is observed at intermediate velocities. The empirical reference data are well reproduced in the projectile velocity range of 1.0–12.0 a.u. (1.5–210 MeV).},
doi = {10.1103/PhysRevLett.121.116401},
journal = {Physical Review Letters},
number = 11,
volume = 121,
place = {United States},
year = {Tue Sep 11 00:00:00 EDT 2018},
month = {Tue Sep 11 00:00:00 EDT 2018}
}

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Cited by: 48 works
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